Ranma ½: Season 1, Episode 150
1 - 150: The Dreaded Happo Mold-Burst
Happosai's always relied on his Happo Dai-Karin or 'Happo Fire-Burst' technique to get what he want, but when the 'karin' part changes to 'kaBIN', Happosai's mold starts gettin' old real quick....