I'm trying to figure out how all of this is done with physics, maybe its because I'm young and naive, but I've learned that without your back leg helping get your back hip forward, then you can not be successful. I recently sprained my ankle in the first inning of a game, and played the rest of the game. I sprained my right ankle, and ruptured a ligament in the outside part of my ankle. I finished the game 1-4 after getting that hit in the first inning. My swing was completely different because i could not put any weight on my right ankle (back side). If what you are saying is true, I would've had no problem at all swinging the bat the same as I did before. I didn't even make decent contact with the ball the rest of the game. Please tell me how this could happen if according to physics and everything you're saying then I should've been able to hit just like nothing had happened.