well done! however I feel like he might need to bounce and has some head movement, here's a pic I used to animate running: 

http://minyos.its.rmit.edu.au/aim/a_notes/p_images/walk_2_legs(side).gif

Hope you will find this helpful!

very goog drawing and animation is pretty fine, but his head is too stiff. like he's just  swallowed a stick ;)

i like the animation a lot, and the drawing, the colors.... pretty good stuff! but i agree with Emanu, he should be leaning forward... he seems to be running fast, so he'd have to be leaning forward to get enough balance ;)

Well done. It does remind me of those far out chinese movies.

Looks like he's about to strike.

I feel that the upper body needs more movement. Right now, the walk seems like that of a chicken. :P Other than that, animation is really smooth and it looks great!

I think he should lean forward more! right now its more of a strut ;)

Smooth animation. The butt seems to be kinda sticking out somehow.
Also at first I thought it was a girl with a beard :).

i think my only real problem with this is that it seems awkward how he is running. other than that i think it looks great.

Pretty smooth movements you have there... nice.