Imagine this, only going diagonally-up. Ripped by AJ Nitro.
The arcing snowball is an attack used by Bad Mr. Frosty in ClayFighter and ClayFighter: Tournament Edition. It's an anti air version of his snowball attack This is a charge attack, meaning that you have to hold a directional button back, then press the opposite of that directional button and the button that requires the attack to work (along with the strength of the button). In this case, you have to hold down for at least two seconds, then press up and kick (any strength will do) to use the attack.
In C2: Judgement Clay, the move returns but is used by Frosty's evil clone, Ice, and is renamed "Stay Cool."
This move is very similar to Tiny's Arcing Medicine Ball.