first time animating with line tool. (no arms)

http://www.filz.us/view/80196610-413/

Things I know I need to work on:
Stick Construction
Additional frames for anticipation and/ or fluidity.
Physics (if applicable)
Re-sizing

Feel free to leave a comment and add to my list!

Cool,Btw here's my review about it.

At the first back bending,the body looks moved a little bit left,maybe just a little move to right to make it perfect.
The falling ease thing doesn't fit,because it looks tween movement^{(I'm not saying the animation is tweened)} Maybe a little bend at the foot and legs to make it realistic.
His head and body goes lower a lot,put his body and head not lower at his hips.
The foot at the running state looks repetitive because the fps or the animation's movement looks so fast.
Why removing the arms?It'll be cool if there's arm and animated too xD.

8/10

No arms?
He's a double amputee.
just kidding, thanks for the cnc.
I think I may have just gotten hasty and skipped some vital positions of his run.

Yea I like the forward lean into but yea something is off about it. Maybe it is some vital positions of it. Seems like there is no cross of the legs and even though his back leg goes back it doesn't seem to really be pushing him forward. Maybe because of the lack of the crossing the legs pose. Still you're starting to get the hang of it, keep it up PBrush.