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At “Xplode Fight Series: Tidal Wave,” which took place Saturday in Valley Center, Calif., Christine Stanley (3-1) unloaded a vicious spinning heel kick that landed remarkably flush.

Although it was apparently recorded as a five-second knockout, Stanley connected on the kick just 2.3 seconds after the bell, opponent Katie Anita Runyan hit the mat after 3.5 seconds, and the ref waved it off just under the 5-second mark.

The kick, which soon made the social-media rounds, is available from another angle