Great timing and a splendid capture - very sharp for an action shot - but I think you've slightly overdone the post processing. You could do with a little less of the unsharp mask (i'm guessing that's what brought about the halo effect) and the desaturating has somehow dulled the impact - was it really worse in colour? Also, the sky is a bit on the noisy / pixelated side, and a gentle neatimage / guasian blur on the background might have reduced this a bit. The hand on the left is also a bit disturbing as it looks like a monster has bitten two of the fingers off - but that's just an observation and not a score altering thing... good effort, you just need to tone down your editting a bit.
I love it, the glow is very effective. I would crop it a little bit differently. I wouldn't be suprised if some people might think it's a graphic art (aka a drawing or cutt out) and not a photo. (9)
Good action silhouette. The grainy and white outline to the skate boarder seems to fit well. I'm interested to learn the technique used to achieve the outline effect.
Background too grainy and what is with the outlining? Way too much editing of what could have been a good shot, except there does not seem to be a backlight -- unless I am missing it.
Good job of capturing the action. The glow around the body doesn't add anything for me - it seems too "uniform." Image is pretty well centered which doesn't add any impact.