Big babies up in Buffalo, apparently some jerks put batteries in the snowballs.
The snowball(s) that were thrown at Patrick Mahomes were after the game play had ended, but what is not mentioned is that there were earlier incidents where the snowballs were thrown at players DURING PLAY.
IMHO, the reason the REFS didn’t make any call on it was because it was ‘a Bills Fan throwing it, and it missed the target (a Chiefs player) and hit a Bill’s player.