Nothing can stop a truly dedicated grappler. N-O-T-H-I-N-G.
Not elbows, not knees, not roundhouse kicks, not mace, not a girl scout standing in front of you selling cookies.
The only hope you have is to find those spikes that kill Mega Man in one hit when he falls on them, and place a trap door in front of your opponent. Of course, this will only work if your opponent is wearing blue ceramic armor. Obviously, these are not the usual circumstances you'd find in the Octagon, but if you funnel enough money Dana White's way, you shouldn't have too much trouble getting the necessary arrangements made. Don't thank me though- seeing Matt Hughes flying apart in a shower of bright white spheres is all I need.
"Prepare your mind..." "For a mind explosion!"
-The Human Giant, Illusionators