At my school, a lot of people goof around about music and don't care about it, but this place actually has people who really care.
It lets users create short videos in which they can lip-sync, dance or goof around to popular songs, movie scenes and other audio sources, and then post the videos to an Instagram-style feed.
You will never be good students so long as you goof around.
They just goof around, roll around on the floor and fight.