I have noticed that when I sit, one of the things that happens when self seems to drop away is that my heart opens (or maybe my heart opening causes the self to drop away, it is hard to tell which). This is hard to describe but it feels like an opening or even flowering in the chest/heart area followed often by one of two things - a large smile or quite deep sadness. Sometimes one follows the other - this happened when sitting the Zazenkai yesterday.
Anyway, I was just wondering if anyone else had felt this. It seems to be a very receptive state and quite raw. Maybe it is just one of those makyo things?