The one inch punch or the one inch push

Here is an example of a Jeet kune do one inch punch its unsupported and breaking the kinetic chain in several places,this reduces the concussiveness of the strike and is often portrayed as little more than a push,its also completely different to the style you see Bruce Lee using in his clips

when you land a close range punch the the kinetic postion its much more concussive with more drive to knock you off balance with the impact rahtar than pushing you after the fact as well as hurting much more.As you can see in this clip here