My step dad had a sensi that could do this. throw without touch he said it was like this:
you are convinced that you are going to launch a succeful attack but then all the sudden you go flying and you wonder how you got there.. a lot of O-Senseis students have similar expirences. its not always OMG hes gonna wipe me out but rather you attack and nage somehow uses your energy and uses it to throw you... I have seen it.. is cool..