The gold medal that Torri Huske of the United States won on Sunday in the 100-meter butterfly barely eluded her three years ago at the Tokyo Olympics, a letdown that might not have annoyed her so much had she won silver then, or even bronze.
In third place at the turn on Sunday, Huske powered to gold, edging her teammate — and world-record holder — Gretchen Walsh at the end by touching just ahead of her. In a sport defined by infinitesimal slivers of time, that brief gap is either a flash or an eternity, and often it is both.