Don't let Kevin Lee take your back. 

Just... don't. 

The UFC lightweight contender is an animal from that position, securing four of his nine UFC victories via rear-naked choke.

None, though, was as brutal as the one he unleashed vs. Magomed Mustafaev at UFC Fight Night 99 in November 2016. 

While Mustafaev seemed to be defending the choke, Lee's squeeze was simply too much. The lights went out, and Lee left his opponent face down on the canvas as he made his victory walk. 

Watch the full fight below, courtesy of the UFC. 

Lee (16-3) returns to the Octagon this Saturday to face Edson Barboza (19-5) at UFC Fight Night 128 in Atlantic City, NJ.