We went out before the sunrise to take pictures. It is really dark out in the desert - no street lights. When you are driving, you have the headlights of course. Buses on the Hermit Rest Route run one hour before sunrise to one hour after sunset, but after you get off the bus (or park) and walk to the overlook, it's dark. But it is definitely worth it.
So it might be wise to have a flashlight so that you don't accidentally walk off the edge somewhere.
I'm sure that every visitor with a camera has taken a similar shot of their impending doom. There is probably an old shot of Teddy Roosevelt pretending to slide over the cliff somewhere in the attic of the Whitehouse. But still it's fun, why not do a shot for your own scrapbook. By the way there was a broad ledge under this outcropping, I faced no worse injury than maybe a scraped shin.
Not my cup of tea. With my fear of heights I'll stay behind the railing, thank you very much. Actually, several people fall to their deaths each year in the Grand Canyon. I'd rather meet a grizzly than crawl out on those rocks.