I was also looking forward to finding out more, and eventually the post got buried under. So I figured I will bring it back up… ...For me it is as though the body becomes a boa constrictor, so I clench the body. It happens instinctively for me (I think) because it is my defense for not falling out. Sometimes, even before the energy bursts I tense up, defensively. And it may not be overpowering after all, fact I wouldn’t know beforehand.