CC
THIS
O_-
*cracks knuckles*
When the blue guy makes his first step forwards, his foot isn't picked up; it glides. This is unrealistic. He would fall over. It has also made the leg stiff during that time. The easing on that part is applied to the entire leg at once, whereas the top of the leg and the bottom should be eased separately. Try bending the knee as the upper leg moves forwards so that the foot moves up for the first frame, along and up for the second, along only for the third, and then either in a straight line down to the floor over the next frames if he wants to stop or over and past the point where the foot will go down if he wants to move forwards so that when the foot hits the floor it is already moving backwards which will help the steps flow together. The same applies to the red guy, although his knee did bend a little bit.
I think the spacing was slightly inconsistent which made it look a little bit shaky. It's hard in slow motion because the spacing is so small and errors in consistency matter more as a percentage of the whole than as a nominal value, but you need that spacing to be perfect.
During a punch, try bouncing the knee of the leg on the ground slightly as he moves forwards. This will make him loosen up a little. You're aiming for a sort of curved line of motion with the entire body. I have an exaggerated example of what it would look like if he's standing still
here (albeit without much power - I mean to add it at some point).
On the throw, the red guy has one hand on the blue guy's arm. If I were you, I'd have that hand go to the arm as the blue guy punches. This will help make it look less like the red guy goes down and then the red guy goes up, and more like the red guy shifts position to grab the blue guy.
Part of the red guy's forwards movement should be as he's going down to dodge the punch. Then he should still be moving forwards a little bit as he goes up again to throw the blue guy. This way you get one fluid movement, rather than the four noticeable separate ones. It will allow the momentum of the blue guy to carry on while he's in the air and make it more of a throw where the red guy has used the blue guy's momentum against him than a pick up and drop which relies on the red guy's strength.
There is a significant loss of momentum on the blue guy's legs as he is picked up. They need to be looser and basically overtake his body while he is still above the red guy.
When the red guy throws him to the floor, he shouldn't be bending his arms to drag the blue guy down - he should be keeping his arms extended to lever him over.
I think you'd benefit from a stick with more than one back joint. There were a couple of places where a curved back would have looked much better than the jagged one; notably the red guy's crouch.
You could probably afford to cut a frame or two before the blue guy lands. The landing lacked force.
Good balance on the red guy at the end.
Overall, it is superb considering it's done in slow motion. The movement's are generally well thought through, but they could use a bit more smoothness to them. You have done well.