Can be from any genre. Mine is when an acoustic guitar comes in towards the end of a song and totally changes or reframes the mood/energy (see "Money" by Widowspeak)
Siren noises and airhorns and generally post-ironic soundboard noises. Like remember DJs in the early 2000s? When the radio sounded like
(Tires screeching)
Husky overly excited voice: you’re listening
(Siren blaring)
To the one and only
(Red tailed hawk screech)
(Machine gun noises)
97.4
(Dog barking) (mgm lion roar)
KZRL “Krazy” FM
(Choir sings hallelujah)
Your one-stop-shop for hits from the 70s and 80s
(Chorus from “don’t you forget about me” plays)
(Guitar solo from Panama)
All those stupid noises are great when they get shoved into mid 2010s dubstep music, and when they are put into SoundCloud mashups.