So I have a macro that, whenever I cast the spell 'rain of fire' (In which multiple fireballs blast down from the sky onto my enemies, heeheehee) I say, "Fire! Rain down from the sky and destroy <whatever I'm targeting> because, erm...it's fun!"
Well today I was in the Stormwind Auction House, and I must've accidentally hit the macro button because I looked down at the screen and saw myself saying, "Fire! Rain down from the sky and destroy Auctioneer Chilton because, erm...it's fun!"

Oops.