[Zoner]

The quickest way to end a fight, without resorting to a swift kick in the junk, is to take the base of your hand and slam it upwards underneath the guy's nose. Curl your fingers, but keep your palm open, bend the knees and explode upward. Follow through and make a high-pitched Bruce Lee-esque "OOOOOH-WAAAAAAAA!!!" (this is optional, but cool nonetheless).

This will definitely stun the guy and instantly start his eyes to tear up (no matter how tough he is...it's physiology that can't be stopped). You might break his nose in the process. Bonus!

There's an urban legend that this move could kill someone by driving the nose into the brain. It's not true...just a myth.

Fighting is always a last resort, in my book. Sometimes you just have to defend yourself, however. If you're lucky enough to see an opening to try this move, go for it.