Remember when you feel pressure, move from the point of contact, in a way that is relaxed but not floppy. it could be just a push, but it could also just as easily be a knife up against you. You never know so make sure you move. But remember don't just fall over at the slightest touch. A person must know how to touch in the right place, at the right time, with the right sensitivity to influence another person. Falling over for no reason does nothing to help cultivate this sensitivity, But breeds a false sense of security, leads to misunderstanding of our training methods, and can result in a lot of pointless debating online. Find the balance between moving with a force, and being honest in your attacks (i.e. don't fall over if you don't have to). It's a fine line and like all things can be a double edged sword.