I've always speculated that the sensations experienced during transition are caused by your concious mind fighting the onset of sleep, that is, it keeps jerking you out of sleep paralysis. Think about normal sleep onset, when you are lying in bed and fall asleep, you lose consiousness and enter sleep paralysis almost instantly. It is not a long drawn out process.

This morning, I conciously decided that I would attempt to WILD without feeling any of the vibrations or hearing any of the noises. I did feel a little bit of vibration, but that was all. It was also a quick transition, maybe a few seconds instead of the normal 10-20 spent transitioning. What was different this morning though, I did not get out of bed or try to wake myself in any way.

I'll experiment more starting in the morning