A blind man walked into the Army recruiting office and asked to join the parachute regiment. The recruiting officer pointed out that they couldn't accept handicapped men - especially blind persons.
The blind guy explained that he was already used to parachuting and was a member of a local club where he used his own design of parachute having a release button with Braille numbers which enabled him to count 10, 9, 8, 7, etc down to zero, at which point he punched the button and the parachute opened.
The recruiting officer was impressed but expressed amazement that a blind guy could know when to brace himself for the landing with only a few feet to go.
"That's easy" said the blind guy "It's when the guide dog's lead goes slack".....