I thought the same thing. Like this is it khabib lost. But Once he got out Dustin completely deflated. Huge adrenaline dump. Look like he knew that was his only chance and quit after that.
Those leg kicks would of broke a average man. Dustin has the will of a champion, and the Heart of a Lion! Let's go DP! Jim Miller is another legendary BMF!
Dustin said these calf kicks hurt him more than anyone else in the race and I respect Jim for that so he decided to use this tactic against McGregor and it worked great.