Hot Air Balloon

The phenomena in which a man is sitting on a typically non porous surface area such as a wooden chair, and unleashes a fart that instead of sliding out of the back, up the crack, it sneaks up the front and tickles the testes/ball sack. In some cases can elevate the sack if wearing loose clothing.

Prrrrtttt (fart)- Whoa! The hot air balloon came outta nowhere.