Long time PLA lurker here. I suck at doing prank calls but I had an idea for one so... yeah..
Call up a Walmart, or anywhere that carries DVDs really, and say something along the lines of "I'm looking for a movie, I forget what it's called but it's got Nicholas Cage in it and he becomes a superhero with some kids or something."
And then when they say Kick Ass act all offended that they said the word ass because you're a Christian and you don't tolerate language like that.