A blind man was describing his favorite sport, skydiving. When asked how he accomplished it, he said that things were all done for him, "I am placed by the door with my seeing eye dog and told when to jump. My hand is placed on my release ring for me and out I go with the dog."
"But how do you know when you are going to land?"
"I have a very keen sense of smell, and I can smell the trees and grass when I am 300 feet from the ground."
"But how do you know when to lift your legs for the final arrival on the ground?"
The blind man answered, "Oh, the dog's leash goes slack."
