Really cool, experiments is a good word for it. I love doing art like that, layering different mediums and angles and perspectives, then taking a picture or video and using that as the starting point for the next layer and on and on until the process overcomes the constituent objects.
I've been laser cutting stuff and taking pictures of the negatives left behind, which I like as much as the originals.
RE: Shadow Drawing - May The Force Be ..Wait for it