i like it enough. i think the explosion out of the eyes is a nice touch. I think if i were to take your animation and were commissioned to do it somehow differently, id say that id continue to jerk the head backwards, more violently than you have now, to indicate that the blast coming out of his face is propelling his head against its proper alignment on his shoulders against his will. I dont really mind the fading out part, it removes a flavor of violence from the whole thing, just perhaps give the head more of a kick backwards over his back than you currently have illustrated.
For the second animation i really like the motion of it and anytime you get hit so hard you spin in midair its really impressive. This is a far more complex animation though and i feel like there needs to be some thought put into the momentum of the hit, how that energy transfers into the body to get it to spin the way youre trying to illustrate, and really stress that the upper part of the torso is spinning a bit 'ahead' of the lower extremities, sort of pulling the rest of the lower appendages into a circular motion with it. the way the spin is illustrated to me reads as if there were more of an upward force than a horizontal one, yet he moves farther right than he does fly upwards. So i think that all has to be considered when moving forward and fleshing out the details of this anim. I do think its a grand start though (the rough quality it has now reminds me of like a really strongly animated stick figure death theater animation or something).