okay time to answer my question..
if someone charged at you full force you could do one of two things:
1. dodge to the right or left of it and throw up your knee into their stomach, proceeded by your elbow into their back
2. dodge to the right or left and kick them in the middle of the back or back of the knee as they pass
The reason anything else wouldn't work is because when you got a guy coming at you that is twice your size at full speed, punching or kicking him head on isn't going to stop him.. it might hurt him, but it will just piss them off even more as they continue to fall onto you beating you senselessly
If you aren't able to dodge there is only one other move which is the trickiest, and that would be to grab their upper body, roll back, and flip them right over.
It's all about the momentum
