as mentioned here is the GSP highlight clip:
www.youtube.com/watch?v=2P2qxCEQCxk&feature=related
GSP started in kyukushin karate fighting full contact knockdown
he is the UFC Welterweight champion
this is the same weight as Bruce Lee
Vunak said GSP was the most JKD like fighter he had seen
you will see the Superman punch in this clip, and the odd spin backfist, and he has a good head kick, and uses the armbar
this also goes to prove what I said 20 years ago that despite everything that has been added from other striking styles, the kicks, HKE, and grappling, UFC (even if you have to call it MMA) is primarily a punching art again, just like boxing
the real difference is in boxing, under Queensberry rules, you must stand back when the opponent goes down, in UFC you carry on punching - so it is still boxing, just "Ground Boxing"
and see how the Grappler's guard is useless if he hasn't practiced the punch block series - he never gets a chance to try any submissions