I remember I had a really good teacher once who said he could teach me any song I wanted to learn in an hour, so I brought him a cassette (yes I said cassette those were before CD's for those of you who don't remember them.) of Extreme's song "Stop the World". I figured with all the weird jazz chords I would make him earn his hourly rate. He kept his word and taught me the song in an hour, but I distinctly remember hearing him mutter "a$$hole" as he was trying to pick the chords by ear... :)