Bobbing for farts
The act of flatuating while your lower half of the body is submerged underwater and catching the air bubbles in your mouth as they pop at the surface.
Yeah cake farts are cool, but have you ever tried bobbing for farts? My Uncle Jeremy showed me this game at our annual fundraiser 'Pool Party for the Poor'. I recommend eating sauerkraut beforehand to build the natural gasses in your body and for best taste results.