So this blind guy decides he wants to go sky diving. He goes up to the sky diving company and tells the guy at the front desk that he wants to go sky diving. The guy at the front desk says "your blind there is no way you can go sky diving." The blind guys says, "why not." The front desk guy says, "you couldn't see the altimeter, you wouldn't know when to pull the cord." The blind guy replies, "thats not true, I will know when to pull the chord when I feel slack on my dogs leash".