So you've been away at school all this time. Well it's a bit to work on here. Landing on the ground from that height would have reacting force which is not shown in the figure landing. He should appear to bounce a little and recoil from the ground force punshing back. also you should apply some easing to the fall and acceleration. Then the run could use more inbetweens as well as acceleration. It's also a bit jumpy at some frames. That's it for my CnC

Glad to see you're back bro! (hopefully)

well when he lands he just... lands. he should land, bounce up a little (or at least stretch his legs a bit) and get up.