Honestly, I couldn't think of anything other then to bail. Save yourself, your quad can be rebuilt for Much less than you can be rebuilt for, trust me. I have 13 pins and 2 plates in my forearm as proof.
If your going to dive off your quad, try to get Way off to the side, or up hill as much as possible, and when you dive, see if there's anything to stop You from rolling down the hill also. Dive into bushes, out infront of a tree (as long as you have Near NO speed moving towards the tree other than the dive itself), Anything to keep you from getting back tangled up w/ the quad.
~Bill