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To the Editor: I should like to call attention to a new variation of an uncommon form of epilepsy, namely, "Nintendo epilepsy." I recently saw a 13-year-old girl who had had a generalized tonic—clonic seizure while playing the video game. The game had been given to her as a Christmas present, and she quickly became obsessed with it. On the day in question, she and a friend played steadily for three hours, taking only a 10-minute break, until, during a particularly rapid phase of "Super Mario Brothers," she felt "strange" and proceeded to have a two-to-three-minute generalized seizure, witnessed by . . .