Taken from Kingfrnks page.
I love not only the initial move which speaks for itself of course but watch his footwork on leaving its a skip away in switch stance so that his last move is his right leg goes back around his left leg to get him back into his natural stance.
This is not just an accident this man knows his stuff.
If he had just gone straight there(without the skip) he would still be in range. But instead: even with the risks involved in pulling this off, he has kept one last distancing mechanism just in case he gets chased out or followed out with a reaching cross.(his last leg move would naturally dissolve any power out of a following punch and it would put him in the position of having time to land over it after it fell short.