I'm having trouble figuring out what he is doing. It almost looks like he is standing at the back of the floor, but I think he's really in the air closer to us. What activity is he doing? It looks like he's just hopping into the air. OK, I finally figured out the skateboard. Jumping on a garage floor isn't especially thrilling. I'd recommend the scene be changed to an empty pool, a railing, or half-pipe. The background here is far too distracting. Additionally the guy is chopped by the top of the frame.
Well good job of catching the movement like that but I must say this is probably the least interesting setting I have ever seen for a skateboard picture, if you set this shot up, why not go to a more interesting location? It´s a huuuuge drawback I am sorry to say.
The background is way too busy and I would like to see your main subject placed in a more interesting space in the frame. Nice action catch and good exposure.