You're about to see why the phrase "fights like a girl" is giving a few Muay Thai (combat sport of Thailand) instructors nightmares.

The prank involves sending in a female Muay Thai champion into a newly opened training gym posing as a nerdy, inexperienced, in-over-her-head new student. The owner of the gym thought it would be fun to surprise a few instructors--and by "surprise," I mean get their butts kicked. Badly.

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