Skepticism

"Trust, but verify."

All the sources (1) agree that everybody was kung fu fighting. In addition, no verifiable source mentions that nobody was kung fu fighting. In conclusion, we can assume that everybody was actually kung fu fighting. [I have a PhD in physical anthropology]
- Furthermore, everyone was an expert fighter, being all faster than lightning.
- Was this before or after the man in the back said "everyone attack"?

Several people were kung fu fighting

Their speed was metaphorically lightning

They indeed were...and don't call me Shirley.

Ok, is no one going to mention that he is holding a smaller hand to adjust his sunglasses?

AI image generators having to scrape stuff like this and somehow not come up with monstrosities
- "An image of kung fu fighting, please."
  Screen full of sunglasses and hands touching said sunglasses to put them better on the face with a face
  What
- Not sure if this is sarcasm or a reference I'm not getting, but just in case: It's not AI generated. I know this because the sign in the background is legible. The hand belongs to the woman to his right. The photo was taken right as he was lifting his hand to adjust/remove his sunglasses.
On a closer look, the small hand is the guy behind him holding a phone to his ear
- Is it a different guy? Or is it a second smaller head behind his larger head?

A healthy amount of skepticism is indeed important.

In this essay I will explain how it is not possible for them to be as fast as lightening. 1/348

Let's say for a minute, that hypothetically, everyone was in fact kung fu fighting. Now statistically speaking of course, this is impossible. Now hypothetically if they were, hypothetically of course. Now, would they all be performing the same so called Kung Fu move? Statistically speaking that is highly unlikely. This would also, hypothetically, be quite dangerous if it were to actually occur. Coming from a medical official, my wife, who is a doctor, she says that hypothetically, this would be dangerous. So, logically, this would not happen. So in fact, there is no way, impossible even, that everybody was Kung Fu Fighting.

I really want to give you a wedgie for typing that
It really depends on what group of people we're talking about, what if you were attending a kung-fu-con, then the odds of everybody kung fu fighting increases dramatically
- Except lightning travels at 270,000 mph, therefore it is literally impossible that their moves were "fast as lightning."