There is a famous claim that says the way to trap monkeys is by placing a staked container with a hole cut into it just wide enough for a monkey to stick its empty hand into.
The container is baited with a banana or something attractive to the monkey. The monkey reaches for bait and then, since it will not release the bait, it cannot pull its hand out of the trap. It is then captured. I
Is it effective to trap animals this way?
Important note (-; (there is a Simpsons episode where Homer exhibits this behavior. Homer tries to get a free soda by reaching up into the soda machine and gets his hand on the can and it gets stuck until they realize the reason he is stuck is because he wont let go of the can.)