Over the course of the years on my AYP path, I have naturally experienced the two flows of kundalini - rising and descending and merging. There has been phases when the upward flow has been prominent and phases when the downward flow has been prominent and also phases when kundalini flatlines (merges) and refuses to flow.
Over the past year (perhaps longer), I have been experiencing an extremely intense upward flow both during my sitting sessions and anytime during the day. This is also accompanied by the feeling of the mind 'freezing' and unmovable - not just in the head but the whole central channel. After a couple of incidents of people, scared, shaking me and asking what is the matter with me, I decided to take a selfie. I was a little shocked at the photo. I looked dead, eyes in sambhavi, face drained of my life-force. It's certainly not the serene, radiant face of the accomplished Yogi. It's the face of a dead person!
I am not particularly alarmed by this. I simply pay attention to stop it from happening when others are around. But I do wonder what that is about - is it just the normal upward flow of prana which has simply gotten more intense or a step towards some specific state of samadhi?