1. Head butt
2. Elbows
3. Thai Kick (with the cut)
4. If it goes to ground, Heel hook or Rolling leg lock.
The guy can't fight if he can't walk.
Although I had a guy get me in the syphoid(spl?) process with a twist kick. I couldn't move, breath, puke or cry. Just knelt there on the mat, gasping for air.