I thought that the plane's shadow looked wrong too. So, I drew some lines on the image to see if the plane's shadow was cast onto the pavement correctly. The green lines connect Garret's body parts to the corresponding parts of his shadow. The red lines do the same with the plane and it's shadow.



Without going into a lot of details, the law of perspective dictates that all of the lines that I drew tracing the path of the shadows should converge at a single point if extended far enough (in this case, according to the green lines, they would converge off the image somewhere to the lower left). The shadow of Garret is correct and undoctored. If the shadow of the plane was correct, then the red lines would converge to the same point as the green lines.

I can only guess why they faked the image. Maybe it was just easier to create the symmetrical composition with some cutting and pasting rather than by clicking the photo at the perfect moment???