Alright.
I found my brush tool was fucked up (I mean it's not beautiful, the stickmen pose like gays and are so much not smooth). So I tried the line tool and I think I'm gonna stay on this tool. :)

[Animation here]

What do you think ?

Infos
-Canvas : 800x450 (16:9)
-FPS : 30
-Time spent : half an hour.

More animations [here] !

The only thing I can say about the animation, is that the guy makes the backflip jumping with only 1 foot, and his legs should bend more to give more strenght to the jump. But it's pretty smooth and have flow :3 my first battle was made with the brush but when I lost my tablet I had to switch to line and now I can't animate with brush ._.

Quote from Kodoku

The only thing I can say about the animation, is that the guy makes the backflip jumping with only 1 foot, and his legs should bend more to give more strenght to the jump. But it's pretty smooth and have flow :3 my first battle was made with the brush but when I lost my tablet I had to switch to line and now I can't animate with brush ._.

Line is pretty amazing. Since now, I've been using the brush tool with my tablet.
Now I only use it to make blood, smoke, explosions, etc.

Thanks for your comment anyway. :)

HE DIDN'T STICK THE LANDING!! You want that gold medal at the Olympics right! I like this and I agree with Kodoku. Also line tool is hard to animate with, IMO so nice going!

The landing after the first backflip was to long and disrupted the flow. Cutting out some double frames or something might of helped.
Here is a acrobatics tutorial
http://forums.stickpage.com/showthread.php?60891-The-Realistic-Acrobatic-Tutorial-(by-Wraybies)

I'll work on another acrobatics animation.
I still have to do my GMDC tribute thought.