I'm not really so much of a fan of Bruce Lee as I am of Jackie Chan, but I sure do appreciate the guy. I just felt making a blog post doing a commentary for this particular scene from Bruce Lee's Fist of Fury (aka The Chinese Connection):

I tried looking for this scene in it's original cantonese with subs because I really don't like dubs for foreign movies, other than that this scene is simply awesome. The entire execution of this scene is just done so well from beginning to end.

What's happening here is (trying to remember from memory right now) is that Bruce's character Chen Zhen, who's going through a really angsty phase since he won't believe that his master could've been killed in a fight, barges into the kitchen of the dojo and discovers that their very own chef is in fact...  Japanese! Who are, by the way, somewhat the villains of the story since it's set during the period of Japanese occupation of China - I think? The chef then admits to killing their master, and so Chen Zhen sets about on his swift and deadly beatdown.

If this was done by anyone other than Bruce Lee it really wouldn't really be all that great, his charisma is what really fuels it all. That punch is probably the greatest punch in film history - EVAR! Bruce's scream, the delivery of the punch, the way the actor who's playing the chef reacts to the hit, the slow-mo, the music that drowns out the sound, Bruce's prolonged intensity; the sense of sheer power :o !

With a single, focused fist (of fury?) Bruce's punch impacted so hard that the shockwaves destroyed the guy's inner organs, and with such speed that it instantly killed him!