I never once solved a Rubik's Cube puzzle, but I haven't tried doing it blindfolded yet.

There are videos of people solving the Rubik's Cube all over the internet, with the "quickest" solve being 5.5 seconds.  This next video blew me away:  a man takes a few seconds to look over the cube, then he is blindfolded, and he solves the puzzle IN 28.8 SECONDS!!!!

Amazing!!

(Via Youtube and Google)