I was on a busy bus this afternoon with my two small children. We were standing in the aisle, and moving aside to let people by. At one stop we obviously weren't moving fast enough for one old man, who shouted 'move!' and whacked me on the back with his newspaper. It didn't hurt, but I was gobsmacked. Fortunately I had the presence of mind to tell him that he shouldn't hit people, and that he was extraordinarily rude - but I still feel astonished. Am I overreacting?