This should make someone laugh... I know I did!

You are on the bus when you suddenly realize ... you need to fart.
  The music is really loud, so you time your farts with the beat.  After
  a couple of songs, you start to feel better as you approach your stop.           
  As you are leaving the bus, people are really staring you down, and
  that's when you realize, you have been listening to your ipod.

Thanks Stacee you made my day!