, I get it now! SLIGHTLY OFF TOPIC: As I am legally blind, and we did not know until I was 4 years old, it made me learn my surrounding more than what average people would. So, when I infer a picture, I generally check out surrounding of specific objects if I am having trouble figuring it out. On this picture, all I can see is a vent, which appeared to be on the floor at first. With a primarily, solid white background, I figured it was a floor also. Items such as wall outlets, textured paint, or brand name drywall would help me understand this. I would be willing to bet I am not the only person who struggled with this, and not for the same reason I did. Everybody has their own way of percieving unfamiliar scenes. Credit to @Mike Rotch for the incredible photography (you really do have some awesome photography) that threw me for a loop and @Boffin for un-looping me.