Getting a handjob while riding on a roller coaster where your feet dangle. When you are climaxing, kicking your legs furiously as if you were walking on the sky.
To achieve tremendous, excessive, or outrageous air with or without a motorized vehicle (snow-machine (mobile), dirt bike, or other) by launching from a ramp, jump, cliff, natural or manmade feature. If one successfully lands a jump that has been skyballed and there were witnesses the skyballer often times has trouble fitting their head and balls through standard size door frames.