Sculptor and engineer Stefan Bennedahl created a hook called the Clever Hook that truly lives up to its brainy name:
Neatly packed into a translucent acrylic housing, the wall-mounted Clever Hook has a self-grabbing mechanism that holds up to 40 lbs. When you hang a towel or jacket on the lower “arm” of the mechanism, the weight of the item automatically causes the top “arm” to come down and pinch the item in place; the heavier the item, the tighter the grab. To remove, slightly lift up the item, and the top arm will retract.
The Clever Hook makes it easy to hang things like towels that tend to fall off hooks, as well as items like jackets and coats.