This was for a magazine article on remote controlled gliders. There are a total of 17 shots, nine of which are the glider launcher and eight for a stitched BG because the sequence took place over a 20 foot (6+ meters) area and the BG changed with each shot. It was a bit tricky, but a fun shot none the less. Note that you can see the BG in each of the launch sequences because of the transparency used.