in the last one he blends in to the background too much. Observe him making the jump a couple of times, figure out where you want him to be in the background, get ready and then take the picture. The image would be a lot better if you were closer and lower and had gotten him against the blue sky instead of the trees that he blends in to.
edit: the 3rd is too noisy to be usable as is, I know there probably wasn't a whole lto you could do about it with low light and also needing a quick shutter speed, but it's just too noisy to use 'straight'. Might as well just slap a vintage effect on so it looks like it is supposed to be that way.
I like the first one. Nice and sharp.