Years ago, I bought a novelty gooseneck lamp for Joshua’s bedroom. It had four shades in primary colors (red, green, yellow, and blue if I recall correctly). It was fun, but the shades grew brittle with age and heat exposure and eventually broke. We redecorated Joshua’s room, and prepared to send the lamp for repurposing or recycling.
But wait…

Unfortunately, their manufacturing tolerances were way off. The shelves tilted downward into the room. A lot. The front edge of the shelf was about 2cm (almost an inch) lower than the back. Stuff on the shelves would work their way to the edge and then fall off.