Why is it when i put pressure on the front"balls" of my foot my leg shakes uncontrollably? happens to me with the slightest pressure

Position and balance: It could be due to your sense of foot position and balance. This is a sensation that is picked up by a special nerve called a "proprioceptor" this could be from neurological or musculoskeletal origin. Such a thing could also be due to tight muscle groups in the leg. If this seems to be getting worse or is causing you pain, you should have this evaluated by a physician.