So last I was half way thru a session and flipped to my left side. Was doing the nothing thing. Lots of little this and that contractions and blasts of goodness when I got hit with a half dozen involuntary spasms thru my gut. Started at my anus and rolled up to my diaphragm. Like blam blam blam. Seemed to be at heart rate and was synched. Very strong, maybe two sets of them. Felt like it drove the helix up to my liver. This was a new thing, so winning.