Like the moment when Archimedes leapt out of his tub crying ?Eureka!?, the instant when a 16-year-old Dimple Kapadia leapt into water wearing a red, two-piece bikini was transformational. To loud gasps of different sorts, it signalled the end of an era of innocence in Hindi movies. Fifteen-year-olds thigh-slapped out of joy, and 50-year-olds slapped the 15-year-olds for having done so.