this guy is a master with rhythm and motion you cat learn to draw any kind of life without practicing this in all your art work 30 yrs of drawing and i was missing this the whole time
technically he's animating pose to pose in a chronological way, he's drawing the 1st 80th 150th etc etc. drawings and not drawing the first then the second then the third. but that's being nit picky. i've heard some disneys say stuff along the lines of "if you know where you're going you don't need to draw the end pose first" and some say that it will give the animation more life