Rear Naked Choke

Get behind your enemy and slip this choke into place.  If he is bigger than you, climb that bastard.  If you'd rather not climb, kick the back of his knee and bring him down to your level, then apply.  Once you have this choke in place, hold on!  He may thrash, he may find a brick wall and try slamming you into it.  Just hold on and ride him to the ground. 

Properly applied, he's got 3 seconds before he is gone.

As usual, once he is dreaming, curb-stomp him.  Punt his head into another zip code.  Pick up a hammer and drive it into his skull.  Or, use zip-cuffs if killing him isn't in your best interests.  Or run.

The point is - once you have control, you get to choose how this ends...