It always amuses me when girls insist that they never fart.
Haha, I'm actually laughing out loud over some of the comments in this thread, no matter how old you get, bum burps never cease to be funny
BTW whenever I'm in a cubicle, I fart as loud as I can and don't worry about who else is in there. I've had several people in the bogs at work giggling like schoolgirls before. I just make sure I wait a while until people have definitely cleared out so they can't tell if it was me or not
I also like to give a little round of applause to particularly seismic farts by others whilst in the bogs.