there was a 4 way intersection in my neighbor hood growing up. Back entrance to the hospital and residential streets. On one corner there was a large hill with a empty house on It. We'd stand up there and launch snowball at cars. Like mortar shells. Big high arc throws. It was all in the timing. Roof hits were best.it was dark up af up there and there was a street light on the corner well below us,we were invisible. So much fun. People would stop and get out, be all pissed we'd hoot and howl from the darkness and let a volley go. Then the cruiser would show up and we'd peppa that fucker too. The drive way was unplowed so the cop could do nothing but run his spotlight for a bit. The house on the hill backed up to 9-10 acres of field and woods and then our backyards. It was fool proof. Here's a recent google earth pic. Good times