While studying in the University of Sydney's strict law library, Australian prankster SlenderTheMan (no relation to killer character Slenderman) decided his fellow classmates could use a little loosening up.
Sneakily, he plugged his iPhone into a portable speaker he snuck into the study space and, without warning, began blasting the “Insomnia” remix at full volume for his own personal one-man rave.
After a few minutes, as suddenly as he began, Slender cut the music and quietly exited the library as if nothing happened.
On Facebook, Slender called his stunt "harmless fun." I call it the most bizarre -- yet hilarious -- prank I've ever seen.
Check it out up top.