Well, the boots they use with hooks to keep you hanging on a bar like that are called "inversion boots". They were popular back in the 80's after Richard Gere used them in a movie (don't tell the kids this).

If you want a technical term for the act of using inversion boots, it would be inversion.

What is the proper substitute for "Batmanning"?
Is there a word for "rule by criminals"? Not kleptocracy, which is rule by thieves, but more broadly by criminals.
