You need to work on particles.
The chargeup was very odd, and the laser was even stranger.
Try making them a little neater.
You may want to work on wobbliness, easing, and force.
When he goes down into his stance, the movement is very quick and awkward, so it looks unnatural. Add some extra frames of movement when he starts to go down, and some extra frames of movement when he is close to reaching the resting point in his stance.
The same thing when his hand shot up. Awkward, no easing, very quick and strange.
The guy who got hit was in the animation for several frames after he was hit, making the laser seem very weak and very...flimsy.
Do some research on force and easing. It'll help a lot.