That's really nice, would make a great desktop wallpaper. It needs a little more work on the shadow though.

Hahah, this is excellent, and it made me giggle.
As Oopy says though, the shadow doesn't seem quite right. Possibly has to do with the light source of the photo, which is in the upper right corner behind the elephant, whereas the shadow hints a light source directly above it. Also, the reflections on the bubble don't match up either, though this is probably a bit harder to fix, given that the reflections are on the stock image.