Ok recently I've been focusing more on bars and railings, and starting to try the jump through the gap (under bar?).
I've seen some people go feet first through tiny gaps, like 10 inches or something. And they don't touch either the bar or the wall/bar/railing underneath them. I've tried jumping feet first under a bar that's about waist hight but it still feels extremely odd. I'm always afraid I'm going to hit my shins, elbows, lower back, face or back of the head when I try these.
Anyway, any pointers on how to practice them (like doing what I'm doing in a ~waist high gap?)
Much appreciated!