That reminds me of a story I heard at one of my early RPG groups..
A new guy turns up to play high lvl D+D and brings his own char. This char is basically beyond reason - 17th fighter/20th cleric/33rd MU or something with xmas trees worth of top magic items. The players and GM all know each other well and exchange knowing glances. One of the first rooms has a chest in it as they open the door and in walks the superhero, down drops the Lurker Above and begins to kill the player. The rest of the group walk carefully past the gruesome scene and continue on their adventures, much to the players protestations. He didnt play again