The pocket of air that was where you teleported now get displaced at a very decent fraction of the speed of light while the pocket of space you once ocupied becomes a almost pure vaccum. the air moves so fast it creates a sonic boom that ruptures the ear drums. Then, a few atoms of air collide together with such incredible force the atoms split and causes a small grade nuclear explosion.

Assuming
cylindrical human, 2m tall, 25 cm diameter.
air displaced from the point you teleport to is instantly moved to form a monolayer (1 molecule thick) on your surface.
The displacement of air is adiabatic (no heat is transferred, which will be true if the displacement is instantaneous)
Volume of displaced air: ≈ 100L = 0.1m^3 At atmospheric conditions: ≈ 4 mol
Surface area of cylindrical human: ≈ 1.58 m^{2
Diameter of nitrogen molecule (which is roughly the same as for an oxygen molecule) : ≈ 3 Å
Volume of monolayer: ≈ 4.7e-10 m}3
Treating the air as an ideal gas (terrible approximation for this process) gives us a post-compression pressure of ≈ 45 PPa (you read that right: Peta-pascal) or 450 Gbar, and a temperature of roughly 650 000 K.
These conditions are definitely in the range where fusion might be possible (see: solar conditions). So to the people saying you are only "trying to science", I would say I agree with your initial assessment.
I'm on my phone now, but I can run the numbers using something more accurate than ideal gas when I get my computer. However, this is so extreme that I don't really think it will change anything.
Edit: We'll just look at how densely packed the monolayer is. Our cylindrical person has an area of 1.58 m^{2, which, assuming an optimally packed monolayer gives us about 48 micro Å}2 per particle, or an average inter-particle distance of about 3.9 milli Å. For reference, that means the average distance between molecules is about 0.1 % of the diameter of the molecules (roughly 3 Å) I think we can safely say that fusion is a possible or even likely outcome of this procedure.
- Surface area of cylindrical human
  How to spot a mathematician/physicist.
- Can confirm, as a cylindrical human, 2m tall, 25 cm diameter.
- Thank you for taking the time to do the actual calculations, you are a legend!
- Oh, you're assuming a monolayer. Yeah, you're right then. I thought you were talking about the vacuum end and the air was magic-ed out in a more orderly fashion at the other end.
This guy sciences.
- I mean, no. That's not enough energy to cause nuclear stuff. This guy tried sciencing, which I still respect in the context of a goofy scenario, I guess.
- Nah, just reads too much XKCD.
I assume it's a switcharoo scenario. Otherwise where does the air in my new location go?
I'm wet and sitting on the tile floor. I'm cold :(
Why would air displace so quickly?
- Instantly moving any kind of mass in the context of physics means moving it super close to the speed of light (well actually, it would have to be faster than the speed of light for truely instant which opens up a can of worms all its own so lets just say really really close to instant, as close as the universe lets you get without inviting FTL time paradoxes) which would impart insane amounts of momentum energy that has to transfer to the air it pushes.
  That supercharged almost-speed-of-light air needs to go somewhere (unless were talking about the kind of teleportation where atoms get transposed into each other in which you just skip to the nuke step).

I'm pooping next to my toilet, inside this wall. The tp roll is in my belly.

Now there are three of us
Same. There is also a handicap rail through my sternum.
(This is the exact scenario that occurred to me.)
- Same, minus the pooping and being inside a wall. But I did eat a roll of toilet paper once. (/j) (I have never eaten a roll of toilet paper, yet)

I have simultaneously merged with my desk. My bowels have been displaced and are now bisected with bamboo. I feel simultaneously ripped apart and yet stuck and solid. Every point of my being is as though it has been engulfed in flames. My existence and identity has now become insufferable pain. I feel an impending sense of doom at a foreign body now lodged inside of me.

There are no wounds for me to bleed from and I cannot gasp for air to scream. My spinal cord has been severed and I feel hot prickles on my cheeks and my ears feel as though they are being stuffed with cotton. An internal white hot pressure feeling erupts up my now-fractured spine until it reaches the back of my head and radiates towards my forehead. My peripheral vision looks like static and everything appears to shake. I am unable to make sense of anything and everything goes dark and still.

U killed me op wow

my spinal cord has been severed and I feel hot prickles on my cheeks...
I read that as hot pickles and got realllllllly confused until I reread it.
me too, thanks for writing this so i didn't have to
Really impressive that you typed this comment. RIP.
- They could have become a prolific horror writer but instead they've been desk-integrated.

welp, I'm not sitting on a tram anymore

I'm now having an uncomfortable moment with the airline passenger in seat 26A.

I continue pooping in the next stall over.

Is it occupied?
- If not before, it is now

I'm shitting in the shower.

Aw! I'm shitting in the sink!
- I'm squatting on the landing at the top of the stairs and now need to shuffle off in shame to get some TP for my bunghole.
I’m shitting inside my vanity but also have the vanity inside me so I’m pretty sure I’m dead.
10 minutes ago I’d have been rolling on the freeway at 69mph. So dead either way I guess.

I'm now shitting in my bathtub....

Wooo! I'm now shitting in my shower. There's dozens of us!
Beats doing it outside about 10 or more feet over muddy ground

I am now shitting in the sink.

Inside my boyfriend, for once.

Not with that attitude
A true gamer never pleasures their spouse.

I move into a space occupied by my desk, thus taking 3d10 force damage before moving to the next unoccupied space.

Weird. I also move into a space occupied by my desk, but a Fey mood takes hold of me and I grab the left corner of the table with my left nostril and wrestle it into an oak masterpiece which I then sell to an Elf, just to piss him off.

I’m now in the lap of the guy in the stall next to me.

"Well hello there, come here often? Let me get that for you..."

Does the cat on my tummy come with me? If not Cheddar says that this expirement violates the cat sitting treaty of 1669

We only made that damn treaty because they promised to chase off the rats during the last bout of the Plague. We've had it twice more since then, lazy furballs.
- Maybe we should stop forcefully removing cats from the locations people gather the most. Grocery stores. Churches. Places of business. Maybe the Egyptians knew a thing or two about keeping the Gods happy.
  Edit for the downvoter: maybe you didn't get the joke, but Egyptians basically worshipped cats. https://en.m.wikipedia.org/wiki/Cats_in_ancient_Egypt

I am now sitting on the wing of a plane that is about to take off. Gonna try to Tom Cruise it. Will post updates soon.

I've now telefragged my colleague.

Still counts!

I'm now pooping on the floor. Thanks.

I telefrag the guy sitting next to me on the train

Well now I'm sitting in a different chair. And I don't like that chair as much. 😡

I'm reading this while laying on my right side in my bed. So I suppose I bounce on the bed then. Seems fun!

I fell off mine :(

Don't know, I don't know how much two feet is.

It's approximately a third of a Smoot.
- So around 3,33 bananas
3.5 feet to a meter
Bro just look down. Unless you're an amputee, then idk
2/3 meter

Fall out of my chair, but otherwise unaffected as I end up on the floor.

Still sitting on my couch

Right side couch gang rise up
- On contemplation of the left side of the couch, I would be entangled in two pissed off cats willing to use their claws on me for the crime of sitting on them.
- Nah man. My couch is comfortable. I ain't get'n up. I raised a fist in solidarity though.

I am now sitting in the chair next to me. This is mildly inconvenient.

Hmm, well the railing of my bed would well... be railing me.

I'm standing in a box. I am now a cat.

I hover briefly in the air, next to my bed, and hold up a sign that says "uh oh" before I fall a couple feet to the ground onto carpet. I might hit my head on the nightstand, but I feel like I got off easy compared to most other people.

I’ll have a window seat at 30k feet and the person seated to my left will be free fallin’ for a while.

I'm sitting on top of the bin of laundry I need to fold.

I'm suddenly on the outside of a bus on the motorway. Probably dead or at least badly injured.

hovers in air next to sofa, looks down, looks at camera, holds up sign saying "uh oh" and plummets two feet to the floor creating a puff of dust on impact

Woah, lemmy is for shiters.

Not much, I'm just lying on the other side of the bed. Although my pillow has been replaced with a garbage bag.

Taking a crap in the hallway

Whose left? Mine?

Let’s say, universal left.
- My universal left or your universal left?

i just fell off the bed ouch

Same here
Same, but I'm stuck in the small gap between the bed and the wall

Fusioning with the atoms of the wall next to me. So parts would stay me, others would just transform into very high density stone or something. The meat may fall off or needs to be cut off, luckily my head would be completely inside the wall.

I have been bisected by a table

Closet for me

Yay, I'm in bed now! Good thing, I was getting eepy.

sl you dropped this

Thanks, I'm now pooping in the shower ...

Waffle stomp!
- Nooo I didn't need to know this 😂

I am one with my bookshelves. Unfortunately the Steam Deck hasn't fared well.

Ow!

I'll have fallen about 3ft, landing directly on my coccyx on a hard tile floor, causing additional damage to 2 discs in my lower back that I've already had worked on twice. There's almost a 100% chance that this will result in my needing to have those two discs removed completely.
So I really, really hope I don't get instantly teleported 2 feet to the left while I'm sitting here.

If this involves some kind of adjustment of orientation, then I will be doing an early Father Christmas act and coming down from where I have appeared halfway up the chimney (being generous about how wide that chimney is). If it doesn't, then I am going to be part of the brickwork - except for my guts and arse, which will rot in place in the chimney over the next few weeks.

I’m reminded of this

I would be spooning my dog who is on the other end of the couch. If this was a competition I’d submit my outcome for winner or at least most wholesome. Some of y’all’s are definitely more funny though.

I am now sitting in a different chair at the same table. I continue browsing Lemmy on my phone.

I would be rather sad since I would be sitting next ro my chair on the floor instead of un my chair. My coffee would also be out of reach. I would be sad.

I'm european, so it doesn't affect me at all.

I live in the wall now.

I might be stuck in the floor since I'm laying on a mattress on my left side.

I've merged into my bed and finally have an excuse to not get off of it.

I'm still on the couch, slightly further away from my wife.

My left arm is now part of the wall, so at least I didn't die outright.

My husband is very happy, but he also dies (in his video game)

I have either bisected the wall, or the wall has bisected me.

My ass is now on the ground instead of a chair, ow

My cat Ralph is not gonna be happy about that.

i telefrag my partner, killing her instantly

not a good way to greet the day, admittedly

It is possible that you just merged together as some kind of Cronenburg monstrosity, like in The Fly.

I am now sitting on the laptop my company gave for work, most likely breaking it. Which is unfortunate, but I can probably just request another.

I am inside a refrigerator. Not so great

Kinda cool, though.
- Boooooooo

I'm taking a shit in my bathroom cabinet now.

I die because I get teleported into the earth's air which mixes into all my muscles and bones and organs, destroying most of my cells, stopping my heart due to blood bubbles in my heart if I don't instantly die from that, while a vacuum 2ft next to me implodes.

I find myself sitting inside the end table next to the sofa, instantly destroying it along with a lamp a ukulele, and several glasses I haven't taken to the sink yet

Stuck in concrete wall / window T_T

I die with my body stuck in the foundation. Now my house is gonna be all stinky >:(

I'm now outside the train going 200km/h and have a nice, hard and long fall in half a second to look forward to.

I am in the vacuum of space.

Meaning you're on a space station right now?
- Or he operates a vacuum chamber or some sort of specialized machinery.
- Inertia isn't preserved during teleportation. So you'll most likely end up either in space or the Earth's core.

I'm pooping. Two feet to my left is a wall. I'd be inside the wall D:

Whose left? If I'm lying on my left side do I go straight down?

Fuck, I'm merged with the side of the sofa, and my cat's ass sticks out of my chest. I don't care already though, she mixed with my heart and lungs.

I instantly swapped chair in the dining room.

Inside a decorated Christmas tree. Maybe I can blame the cat for all the glass bulbs I'd break?

Dead. I'm laying on my left side.

Very uncomfortable. You've pulled me off my bed and now I'm laying naked on my power inverter.

I’m partially clipped into a wall. I’ve fallen into the backrooms.

I'm laying on my side in bed, so.... I guess I jump two feet in the air, fall, make a big sound, probally bounce off and break some stuff and then have back problems all day.

I'd be shitting in the neighbor's toilet. It would probably be hard to explain why I'm in their apartment in my underwear.

You take shits with your underwear on?? You wild dog
- I cut a big hole in the back so I can shit through it though. Can't stand the cold seat on my cheeks.

I am now a propane stove/human hybrid.

I am now dead as ive been instagibbed by a wall. Pretty good overall

Two very pissed off cats.

15 stories high in the air over a concrete street.

I have a bag of Skippy Peanut Butter Balls lodged in my ass. If I move they won't be there any more ( ͡° ͜ʖ ͡°)

i'm now in the stall someone else is shitting in

I'd be on the floor. Which is a problem because I have a broken ankle/leg and can't put weight on it for another week.

I'm dead.

I've clipped into a pool table.

I'm in a sitting position, one foot beyond my desk, with my feet about 10 inches off the ground, and my butt is about 16 inches off the ground. I fall on my ass comedically, amidst loud cursing.

sitting on my friend's legs rather than comfortably next to him on the couch

I just took my evening shit on the floor of my bathroom, which is unfortunate.

Not this again.

I now have to crawl back onto my couch. And I'm cold now too.

I'm on the bathroom floor with my pants around my ankles

I am now out of my cozy and comfy bed and on the floor while hitting my head on my lamp :(

I am impaled by the edge of the couch.

A painful and likely explosive death

I'd be in a wall, and 2 objects occupying the same space would like result and a violent resettling of local physics as particles push each other out of the way

Inside my coat closet...not the first time I'll struggle getting out of one

I am in my cat's litter box

I fall to the floor and possibly hit my head on a table on the way down.

My head is now clipping through a cardboard box full of stuff. I assume that wouldn't be very survivable.

I am now inside my desk. I die a slow and painful death.

I'm now swimming in a icy river, with a small ferry passing by next to me. Yay!

I guess I’ll be sitting on the ground now.

I’m now peeing on the floor in the hallway

It depends on whether I displace the wall, or the wall displaces me.

I am now sitting on the left side of my bed instead of the right one.

I'm now on my husband's lap as he driving us 70 mph on the highway.

That seems highly unsafe.

I'm now shitting in the tub and about to fall right into it.

I'm clipping through the hairdresser right now, send help

I fall off the couch.

Finally, I'm inside my wife.

minimum 10 foot fall into the cold mud with my pants down. Please don't.

I shit in the sink.

I'd be literally just standing in the middle of my balcony instead of on the side. Not bad.

I would assume I’m dead since there is a workout machine made of steel next to me.

Superpowers

Wall.

I fell off the bed and got a nasty hit on my head against the bedside table. Thanks, I guess?

I went from sitting in my Jeep in my garage to falling a couple feet onto the floor. Otherwise no issues.

Other side of my couch

A chunk of file cabinet where my knee was falls to the floor. I fall to the ground, twisting my hip joint quite uncomfortably, possibly enough to pull something. I can't actually tell if my leg would be totally trapped, or if I could at least slide it out. If it's caught it's going to be a shitty wait for rescue.

I fall 2 feet onto my bed. I'm lying on my right side, browsing Lemmy from a tablet right now.

High five, same. Except phone.

I no longer have a cat laying on my back.

Sitting in the driver seat of my car so I'd transfer to the passenger seat.

SOMEONE FUCKING HELP ME I'M STUCK IN THE FUCKING WALL

real this house has people in it hours

I just fell off the couch.

I'll end up lying on the floor of the store room. No thank you for my butt hurting me.

Taking a dump in my neighbors hallway

My head would hit a metal chair.

I sit on the floor, despite a chair being there.

I I am now sitting on nothing in the walkway through my living room. I fall on my butt on the carpet, severely swear, and then try for a bit to figure out what the hell just happened.

It's a close one, but I just barely manage not to be embedded in my kitchen counter

Depends Is that like 4 school buses or more like half a pen?

two feet = three chinchillas.
How big are your feet
- Bigger than a feet. Am I big foot? Oh no!

I'm in a different chair

I would be in the other chair.

My upper body has fused with an ICEE machine.

Damnmit. I asked that kid to clean off this coffee table and now there's a pepper grinder, a bag of terrible candy, three remote controls, and some crushed fortune cookies, all under my back.