I have kids... the eldest is 15, and when he gets exited about stuff and is playing... he sometimes does dumb ass things like that. You can either beat them up about it, or realize that yeah they made a mistake, but their intention wasn't evil. Once when my son was about 6 we were throwing pine cones back and forth in a park, when I get hit in the forehead with a big ass rock so hard I saw stars. Prolly explains some of my posts. But the bottom line was he didn't mean anything by it... he was playing, reached down and couldn't find a pine cone and there was a rock...
I don't think Brown had any bad intentions, and not only that but the actual outcome of the mistake was absolutely no damage, no harm to anyone. Sure if you do something stupid and it causes harm or damage you pay the piper, but this was just a case of an over exited kid playing with snow.
I still think Helfrich over reacted. Big time. If you suspended every player for something like that you don't have a team.