South Park - Season 9, Episode 2: Soundtracks

Cartman uploads Raining Blood at the Hippie Jam Fest to get them to leave

Eric Cartman attempts to appease his captive hippies, by giving them drugs and a guitar. Moments later, the room is filled with smoke and the hippies are intently listening to this song.

Stan starts playing an acoustic guitar to fight the "corporate fatcats" that control the world.