The snowball does not, in fact, have rocks in it. Nor is it intentionally hardpacked to hurt. And, if it helps anything, Eric was aiming for his shoulder, not his face. It's just that his aim absolutely sucks.

"Hey, hey, it's just a game. If we're going to be stuck in this...situation, nothing wrong with de-stressing a little, right?"

This might seem a little less ridiculous if the man weren't literally wearing a cloak. Burgundy, nice fabric, embroidered with silver ivy at the edges.