Tell me something quite interesting about door hinges.
The way the hinges are attached on an ordinary door presents a simple optical illusion. The rule for attaching door hinges is ‘six up, nine down’ ie the upper hinge is attached six inches from the top of the door, and the lower one nine inches from the bottom. If you look at a door, though, the hinges appear to be equally placed.
I can't think of anything else interesting about actual door hinges at this time, but I have some stuff about doors in general which I will post up shortly.
Q: SPECIALLY SHOT PICTURE OF AN ORDINARY METAL DOORHINGE (BOUGHT FROM A HARDWARE SHOP)
A: SPECIALLY SHOT PICTURE OF PLAIN DOOR, SHOWING HINGES