I made a short entry on how to make a weak punch look more strong in a live action video. It's not a reliable trick but is good to know so you can save a bad fake punch in a movie or make some sort of impact more intense.

I know the video is laggy in this and you can't quite see the difference, but the idea is for you to try it yourself, if you follow the instructions it should work.

check it out!

also, i made this one video when i was 17 where i figured out how to do it and stupidly made a retarded video, but a couple of these are good examples of this trick.

lookie here.