Old Fat Kenpoka
Master Black Belt
i once heard an interesting theory about defending yourself from the ground with someone on top of you. It was pretty much grabbing hold of them and letting them flail around untill they are worn out, or untill you can do some type of decisive damage to remove them.
I think you have this upside down. The theory is you get on top of someone and let the bottom guy flail around until they are worn out. Then you pound their face into the ground, choke them out, or break their arm.