Blind Skydiver

Alright, listen up, you uncultured swine. You asked for an explanation of this so-called 'joke' which leads me to believe you are not blessed with high intelligence. It's about a blind person skydiving and how they know they landed. Get it? The punchline is the dog lead going slack...because that's the way a blind person would know that he is no longer falling, you nimrod. They use a guide dog, you know the animal that assists the sightless. Get it now? If you don't, I am not going to help you anymore.