It looks like you are using an ad blocker. That's okay. Who doesn't? But without advertising revenue, we can't keep making this site awesome. Click the link below for instructions on disabling adblock.
well done man. looks pretty sick. I like it, thanks for sharing.
As far as improvement, there really wasn't much that I saw needed. But, I noticed a few small things.
1. In the Armada skis picture where tanner Hall is standing, the frame around it is kind of off. Try to make it as if it were a true photo laying on top of another. (half of the framing around it goes into the frame next to it, and then the other isn't there.) Very minor, but it would make the image flow a little bit more.
2. Around the backflip sequence you have the trails of the brown from the previous image that weren't blacked out. Just continue to brush over it with a black brush.
3. Seth's portrait. Make the background transparent, so it's just him against the black background (edit out the small amount of background around him)