Or rather, listen, and then get the hell down. A large black jagged rock flew down from up where the sun was warming the exit, and slammed into my arm after I heard the sickening whirring sound. Fun times! I felt sick when I watched rocks fly right past Fritz as I was yelling "ROCK"! and "BIGASS SNOWBALL OF DOOM!", with big snowballs as hard as rock zooming down. WEAR A *$&#ING HELMET!