This is another example of what humans are capable of when faced with limits. Ben Underwood who lost his eyes at the age of two. Since then he developed the amazing ability to "see" by making clicking noises and listen to the echo like bats do. He can do almost everything normal teeangers do, like walking down a street without help, participate in a pillow fight, play video games or skate on rollerblades. You really see the grace of his movements to fully appreciate his ability.
I especially like how his mother approached the handicap, which is probably for a large part responsible for the development of this unique trait.