Okay, so I (think) that I fixed the leg problem, and I completely redid the arms so the motion would look more even.

Something kind of annoys me about the back arm still though. But I can't quite put my finger on it. It almost seems like the back arm has no elbow in some frames?

EDIT:
I think I fixed it. Now the back arm doesn't look totally off, and single frames aren't as ugly:
