I was going to say NOT donnie yen - I have not seen any of his movies except for the clip above, I don't know much about him except he is always in the papers here.
but if there is anyone who would freeze/shit in his pants/start crying for momma in a real situation THIS is the guy
you can just tell by his fighting 'style' - rigid and cartoon character like, obviously he knows nothing about any form of self defense (not that I know, but I know he does NOT know)
the ridiculous meat tenderizing /heart massage punches and punching someone in the head are just signs of this
he makes movies, calls himself "strongest in the universe", there can't be any more signs of a real-life wimp who is so scared shitless of getting beat up.. major major shrimp complex