Years ago, we did a paintball game with some guys from our fire dept. They FROZE their paintballs, them bastards!
I had ice on me all week long.
I played paintball a few times at indoor places. I got a double welt...someone double tapped me and I had a welt on top of a welt.
But I felt worse for the guy I unintentionally shot in the throat. Right under the mask [un]lucky shot.