"Who's that tripping over my bridge?!" roared the troll. "It is I, the creator of elevator and massage room muzak, and I've come to have a tinkle on your bridge's underbelly-pipes!"
Fallout fan and Instructables user Rabdiga wanted to build a musical instrument that could be easily assembled during the end of days. His idea? A charming pan pipe made out of used bullet casings: