Mr. Umbla, something that only appears in very hard. I've never seen one (I don't play much in VH...yet...), but if I'm not mistaken, he must smack 2 players for the emergency code to be a success. If the players hit him, he'll get angry, the code will fail, and he will start spinning around (with some tornado style attack) making alot of damage to everyone that is caught by his attack.
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