Nice dude, I liked the top one the most. For some of your first few animations you're handling the movements very well, the animated run was good and some of those reactions were decent. You should start adding more frames inbetween those movements, those stickfigures are being spaced out a little bit too much, like the front flip in the second animation, it looks too fast and unrealistic.
You've had a great start with these animation, just keep doing what you're doing, remember to try and slow down certain movements and add more frames.