Spider Monkey Days
Read this over on Cameron's blog and thought to myself: geez, some days I feel like a spider monkey :-)
In order to catch spider monkeys, hunters in South America simply walk through the jungle and drop heavy containers on the ground. These containers have very a narrow top and a wider bottom. Inside the containers the hunters drop a special kind of nut which is particularly attractive to the monkeys.
Sometime later, the spider monkeys come down from the tops of the trees, smell the nut, but the tops of the containers are so narrow they have a tight squeeze to get their hands inside. Once they grab the nut at the bottom, their fist is too large to remove if through the opening. And the containter is too heavy for them to carry.
So instead of letting go of the nut, the monkeys just sit there until the hunters come back, pick them up, and throw them in a bag.