Now, you have to combat stiffness also, for it is another great opponent in your quest to become a decent pivoteer.
Problems with your animation:
Stiffness, definitely. How to know it's evident?
They're in the same position, (basically), throughout the whole animation. Try to animate them trying to balance, for no one can stand completely still in the same position while stalling, grinding, flipping, jumping in mid-air, etc...
Physics.
When one's in mid-air, he cannot stop then change direction, for you would need time-controlling abilities, and skaters don't have that. If someone's falling, they would have to gradually turn while they're falling towards the ground. you get what I'm saying?
Slight Choppyness.
When the smaller stick's scratching his face, it shouldn't go back and forth that quickly, imo. When a stick's going down a ramp, the space is way too big to go from the lip to the center, even if he's flipping. And even then, that would be relatively impossible to do irl.
