Have you ever rudely laughed in someone's face?

There was another time when Bill was joking around at work and gave Elmer's hair a friendly tug and it came off in his hand, and Bill swore and hurled the wig across the room where it slithered to the floor and lay there like a dead weasel but my boss and I fled to our respective restrooms and were further agitated by the sound of the other one through the wall howling and banging on the pipes. But we didn't laugh in anybody's face.