A frog and a scorpion stand across from each other on the edge of a cliff. In the frog's eyes is a deep sense of hope and optimism. In the scorpion's eyes is a deep sense of dread and despair.
The scorpion says nothing, but takes a single step and dives off the cliff. The frog follows, hoping that the scorpion will save it from falling.
"A joke is not funny when it's explained," says the spider.