Dash uppercut - and Smash afterwards (gif, finalized version)

That's pretty much how it should be going, i managed to put more momentum in the preparation of the hit (the character's shoulders pivot / rotate more preparing the hammer elevation, before taking more momentum on his knees too (crouching more) before jumping out suddenly to add a little bit of a spring effect, a slight slow down when the character peaks at his maximum jumping / uppercut height, before taking another little , fast momentum to execute a hammer flip in mid air, there is a lot of little improvements like these (mostly momentums, accellerations and deceleration of speeds to fluidify and make it more "natural" and easy for the eye to follow) and flow better overall.

I also added a better "following" scarf animation when he jumps, but could be better.

Some of the dash smoke and trays might need to be cleaned up, or erased when it goes below the 0 / horizontal line, it was ment to be rendered with a plane cutting the lower half of the dash smoke / particles.