Learned how to kick start a Matchless 500 single barefoot when I was just a flyweight 15 year old, there's a right way and a wrong way, if you do it the right way it's easy although they can still bite you every now and then.
The "trick" is to ease or rock the piston just over top dead center on the compression stroke, give the bike just the tiniest bit of throttle and then kick the bastard like you mean it - no pussy footing around. Just remember to keep your leg slightly bent at the knee right through the kick, that way if it does kick back you don't get launched over the bars as your leg will absorb most of the recoil. Your foot will still hurt but there should be no broken bones resulting.
I've won a couple of bets by being able to start "difficult" singles on the first kick and had stunned owners say "how the bloody hell did you do that" after seeing it.
The guy in the video doesn't have a clue and that bike is going to bite him real bad one day for sure.
