Leo, the stitches are nice, they look like my first attempts. However, he needs to avoid the cut/paste look. Some of the shots, especially the landing part, look to be merely slopped in there. He needs to simply play with photoshop more, using layers and learning the tricks. I still don't know many, I think I do it the hard way and manually adjust opacity and use the eraser to let the layer 'beneath' show through. It takes me 45 min - 1 hr to get a great sequence, but I've been happy with the result.
Here are a few: