While I was at a Volly Ball Tourni lastyear, one of the score keeper's cellphones whent off, with that ringtone. So, me, being the one who takes things too far, started dancing, and singing it. I made a complete ass out of myself, but we won the game.
My personal favorite rington (the one I have) is this guy's voice saying "Dude, pick up the phone. Dude, Pick up the phone! Pick up your fucking phone! Damnit, are you having sex again?"
Then my voice mail picks up. It's great in public places, like the bus, or a movie theater when I forget to turn it off. Or in the school hallway. It also went off in class once.
Good times.