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Bill Cosby's wife does this in one of his standup routines when she notices that Bill fed the kids cake for breakfast. Her face splits in half and she gains the ability to shoot fireballs from her eyes. Then she screams "WHERE DID THEY GET CHOCOLATE CAKE FROM!?!?!?!?!?!?!"
"I always heard of people having a conniption. But I never thought I'd see it. You don't want to see them."