STARTED making shitty music? That implies that the music made was something other than shitty to begin with!!!
Nah, I kid. But I really don't. The movie theatre thing just seems overrated, and as frog has said, beigeboxing is beigeboxing. I'd rather see some creativity as well, and repeating a prank isn't creative.
Also, third party billing is fucking not cool for international calls. Since you're some punk rocker kid who believes in anti-establishmentism, I suppose I can see why you don't realize that, but there's no point in randomly fucking your neighbors or raping their phone bills. If you want to impress people AND be semi-creative, find a way to bill a call to a payphone. (Can be done, or at least could. I did it to the Open Pantry's payphone here since middle school.)
Try something newer than a prank already recorded, and don't steal from people like that. A local call or even nationwide long distance isn't that big of a deal, these days. At least here it isn't. But to do an international call and to bill it to someone is just stupid. Douche canoe.