A couple of years ago I met a guy who was training to become a SEAL and told me they use several different "consciousness techniques". As an example, he said wh

A couple of years ago I met a guy who was training to become a SEAL and told me they use several different "consciousness techniques". As an example, he said when in stressful situations they are taught to recite: "go slow, slow is smooth, smooth is fast" over and over (like a mantra). He had last used it the previous day when jumping out of a helicopter into the ocean to then secure a boat - which didn't include any scuba diving, and for which they could have used box breathing as well.