I was feeling so ****ing frustrated.
http://www.truploader.com/view/038666

at least you're honest!

If you get 10 frames into an animation and start getting slack, thats where you will begin to fail, and sooner or later your animations will look shit.

haha I have to admit, it made me laugh.

I tried a basic punch, and I think it turned out pretty good. But look at those legs! Wobblyness. http://www.truploader.com/view/700180

Yep. They are. was the slow motion basically showing a frame by frame?

yeah .

Alrighty. I know it'll take longer, but try doubling the frame rate and frame count, and fill in the new frames with slower motion. looks smoother that way. 24 frames for something, compared to 12 frames for the exact same action kind of thing. less variation per frame, but more overall input to your eye, leaving less sharp movements. Too much explanation? Maybe. But sometimes it's better to be safe, eh?

I recommend starting with line so you don't have to worry about wobbliness and redrawing, and you can focus on easing.