Ahh... I fought muay thai for years when I was in college. Honored to see it gets the (dubious?) distinction of the most powerful leg blow of their group, at around 1,200 lbs. of force on the crash test dummy!
(The move was one where you grab your opponent by the back of the neck, thrusting his head down while you simultaneously knee him in the solar plexus. I've been hit by an unadulterated one of these and pissed blood for two days.)