By now, pretty much everyone in DC knows about the cop that brought a gun to a snow ball fight. Before casting aspersions, it should be noted that there is historical precedence for gun fire being exchanged during snowball fights. In 1770, the famous Boston Massacre was sparked, in part, by snowballs thrown at the British by angry Bostonians. Fortunately, this weekend didn’t bear the same political tension as late 18th century Massachusetts, but it’s still an interesting coincidence. Police forces don’t take kindly to snow balls.