me too. ive been adding +20 rep for the challenge and watching YT videos on calisthenics. i never new about many of these clever exercises. i always thought calisthenics was like pushing your hands into a doorway. and this dude is strong and muscular for a guy doing body weight exercises.Probably why a lot of guys back off on heavy lifting with age. I know I did and it really wasn't a conscious decision it just kind of evolved like my body was directing me if that makes any sense.