I've been noticing throughout my day a feeling like clearing up and softness throughout my torso like I can breathe better and see better and generally am more relaxed. I was wondering what it is - it would come at random, sitting in class or doing homework etc, I'd notice it especially in conditions that put me under stress because the feeling of ease stands out but it's not necessarily limited to any conditions.

After the lesson this week the next day I felt some pain/soreness on the side of my leg beneath my knee. I also remember one of the times doing the provoking step when I was torqueing my body I felt a big stretch on the butt and I think that rep may have been the time that really stretched whatever was on that side of the leg. Is it normal to have soreness around this part of the leg when doing the provoking step or was I doing it wrong?

Yesterday when doing the standing meditation I felt a stretch on the front sides of the abdomen. It felt a little like a balloon type feeling like there was a tissue being stretched over an expanding inner object. Normally all the other stretching feelings I've felt  in past, e.g. foot couple, transverse, stretch on the back, they've all felt more linnear but this felt like the stretch was being stretched over a more round shape. I also felt like the round feeling stretch a little in my legs as well. This only happened once so not sure if this will happen again or not.