This is one of those videos that make you think about the thousand possibilities to turn this thing into photography art.
It looks like a complicated setup but when I read about it, it seemed like something anyone could do with the right kind of tools.
Demonstration of an optical technique that allows us to see small changes in the index of refraction in air. A point source of light is reflected from a concave mirror and focused onto the edge of a razor blade, which is mounted in front of the camera. Light refracted near the mirror and intercepted by the blade gives the illusion of a shadow.
If you’d like to read more about how to do this you can go to Harvard University science demonstrations.
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