Just Keepin' it Light

Another joke from my Dad sent via email.

I was in the pub yesterday when I suddenly realized I desperately needed to fart.
The music was really, really loud, so I timed my farts with the beat.
After a couple of songs, I started to feel better.
I finished my pint and noticed that everybody was staring at me.
Then I suddenly remembered that I was listening to my iPod.