If your attacker is running full throttle at you with the intention of knocking you down what should you do? There is not enough time to run away, he has caught you by surprise. Let's say he succeeds in knocking you on the ground and has his knees on your elbows and is having fun hitting you in the face. What can you do to get out of this debacle. Somebody I worked with suggested bringing your knees up and hitting his back with them, causing him to get knocked off you, as his weight is forward. I have a hard time believing this would work, than again I know almost nothing about groundfighting, the guy on the ground in this scenario was me in 8th grade! All informed suggestions appreciated.