During my martial arts years, beginning around my 36th birthday, I rediscovered the joy of inversion, often making time to stand on my head after a sweaty workout. These days, I prefer well-supported postures, whether vertical, horizontal, inverted or otherwise.
I've got to say, though, that the photo inspires me. If I can get my feet up there, not to mention the other critical body parts, I just might try this again sometime. With a firm wall, a prayer, and spotters of course!