Hello This is another striking vs grappling question I'm afraid Within the striking art everything from boxing to tkd you'll hear people talking about a "lucky punch" Generally this would be when someone hits someone else and has a much bigger effect than it is supposed to. Often it is claimed when someone deemed to be of lower skill defeats a more skilled opponent. Maybe by throwing a blind punch or by lashing out when in a bad position. Does grappling have an equal concept... I have never heard of "lucky headlock" Is the outcome of a grappling match always skill based? Other things being equal fatigue etc.