My friend Matt was a fucking legend. Guy never stopped, worst person to train with period. He could swim and run for days but he wasnt some crazy fighter when we were growing up. Not sure if he got better as I never fought him post seals training hahaha.Same with the Rangers I've met. My old college roommate is an ex-Ranger and now does all the recruiting in to Ranger assessment and selection. They want guys who just won't fucking stop. To make it through assessment and selection there is seemingly no level of physical discomfort they can't power through. I also think they're born that way. It's crazy. And they don't hate getting in to bar fights.