Great idea. Try and re-shoot it by mounting the camera on the bike seat and setting the self timer. That way it's just the bike shadow and not both. It might give a nice effect.
Maybe it's just because I'm a desert rat but I love this photo. The scenery is amazing and the lighting is perfect. Very creative way of filming this. Nice job.
Out of a gazillion bike pictures, I see something unusual! This is a really interesting photo -- the use of shadow but centered really makes it something to ponder, especially since the shadows are so long!