The Linking Ring published Jerry Andrus’s optical illusion box a few years ago. I spent several minutes marvelling at it and trying to figure the illusion out. It was fun doing that. Over the years I have been doing that to amuse myself.
Now, the illusion is on YouTube. It’s even better on video than in print. And more amazing, too. The moment Jerry steps out of the box, the wooden bar dissolves through his body and heals itself right away.