That is something that I have been talking about for quite some time. In my opinion this is how it works:

Spinning, rubbing hands, grabbing on to things, etc. work because you are holding on to sensations that are in your head and therefore kind of embracing it all. That is why you come back, cause they hold you in that reality. The same happens when you are trying to WILD. If you are too aware of your body you will never enter a WILD, cause you are focusing on the real world instead of on what is going on in your mind. That is the objective of a WILD, in fact, to become absorbed by what is going on in your mind, to the point where you forget what happens in the waking world...