Anus saxophone

A fart so musically tuned it has a similar sound to a saxophone.

This can be caused by:

1: Being able to play a musical instrument amazingly well.

2: Playing the sax while eating beans or sprouts.

Not many cases of this have been discovered as of yet.

"Ooh Christ I just made an anus saxophone! Jesus, what a smell! It's like tear gas! I'm going to be sick! Oh well, it sounds very nice."