Hmm, most of my music collection is bound to scare parents!
How about some nice Bob Dylan (All Along the Watchtower, Blowin' in the Wind, Ley Lady Lay, Quinn the Eskimo maybe?) Johnny Cash (Ring of Fire, Folsom Prison Blues, Boy Named Sue), Genesis (Dancing With the Moonlit Knight ftw!) and, um, Pink Floyd and Led Zeppelin? Everyone loves Black Dog or the Immigrant song.

and Thin Lizzy - The Boys are Back in Town, put that somewhere there :p
Stormtroopers of Death - Black War
"Don't free willy, I say kill him today!"