Some things I notice:
The pants are too loose and it's not looping well because of it. If you make the fabric more stiff, maybe the loop won't pop so obviously.
The motion is looking pretty natural, but I don't think you are looking hard enough at the reference material.
The motion of the Left arm is different
The torso is leaning too far forward, it should hunch a little, but still moved back. Maybe rotate the root counter clockwise , so the head is in line with the hips.
The torso twist should be more exaggerated, and so should the hips.
His Right foot should move toward and away from the camera a little, not just side to side.
His Left foot shouldn't move side to side that much, more of a slight twist.
The shoulders should be up more, but that seems to be a problem with the model, the traps are too thick.
The right arm should be twisting more from the upper arm, like his torso is twisting.
His right arm is also looking kind of stiff, so I would make the shoulders bounce a tiny bit with the hop and bend his forearms with the motion also, just to loosen it up a little.
His left wrist is too straight, it needs to be rotated, so the palm is facing down more.
A stern facial expression would be nice.
It'll work as is, but if you want to get even closer, those are some ideas.