Tell me a joke!

Once upon a time, there were two people, one was blind and the other was lame. They plan to go for an outing, but they can't go. So they borrowed a bicycle from their neighbor's house and set foot on the road of outing. The blind man is responsible for riding, and the lame man is responsible for watching the road. Suddenly, the road ahead collapsed, leaving a big ditch. The lame man quickly said, "ditch, ditch, ditch." The blind man thought.