Watch an American UFC fighter kick his opponent so hard in the calf that he couldn't even stand, let alone walk, straight after

• Alex Perez scored a rare calf kick knockout at UFC 250 on Saturday.
• The American fighter kicked Jussier Formiga so hard in the leg, that his opponent couldn't even stand, let alone walk, straight after.
• It was a lesson taught by the infamous Karate Kid part III character Cobra Kai in 1989: "If a man can't stand, he can't fight."
• Watch Perez perfect that lesson with his first round KO in Las Vegas, below.

A UFC fighter scored a rare type of knockout Saturday when he kicked his opponent so hard in the calf that the guy couldn't even stand, let alone walk, straight after.

The flyweight fight, the third bout at the UFC 250 event in the UFC-owned Apex facility in Las Vegas, was scheduled to go three rounds on June 6.

But Alex Perez, a 28-year-old American, needed little more than four minutes to end the contest as he kicked Jussier Formiga's leg so hard that all his opponent could do was fall to the floor in agony.

It is a lesson taught by the infamous character Cobra Kai in the wildly popular 1989 movie Karate Kid part III starring Ralf Macchio, when Kai said: "If a man can't stand, he can't fight."

Formiga couldn't walk, stand, or even stay upright after Perez was done with him.

Watch the rare, calf kick KO right here:

—UFC (@ufc) June 6, 2020

"It means a lot, I've fought a lot of guys," Perez said after his first round knockout win, one which extended his record to 24 wins (5 knockouts, 7 submissions, 12 decisions) against 5 losses.

"I feel like he's been the toughest guy I've fought so far. It's kind of a bittersweet feeling, I've known this guy for a long time, I met him about 2010, my second amateur fight, when he was the No. 1 guy in the world at the time.

"It's kind of like full circle, I came back and I fought him. He's one of the guys I didn't want to fight just because we are friends, but business is business, I've got to make money and it is what it is."

The UFC has a show every Saturday in June, with at least the next two scheduled for the Apex.

Perez, who was given a $50,000 performance-related bonus for his knockout win, said he would be staying in Las Vegas for the next two weeks just in case there was a late injury to a scheduled competitor and he could fill the void.

"The only number matters is number one, that's the champion, other than that I couldn't care less about the number I got, I'm ready to fight, I'll be here for the next two weeks just in case someone gets hurt."

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