slowly. feel. breath.
I remember watching Big Blue, a french film about free diving. As the main character slowly floated down into beautiful blue depths, I remember my heart rate slowing, my mind quieting, and my awareness pulling inward to my body.
The only other time I experienced this feeling was going into the darkroom to develop photographs. Everything slowed down and my mind would quiet. Something about being in the visible darkness quieted my mind and slowed my breathing. I became aware of my body and felt like I was floating.