Ewing played center for the Georgetown Hoyas for four years and was named as the 16th greatest college player of all time by ESPN. He won Olympic gold medals as a member of the 1984 and 1992 United States men's Olympic basketball teams.
Sleep paralysis is a temporary inability to move or speak that occurs when you're waking up or falling asleep. It's not harmful and should pass in a few seconds or minutes, but can be very frightening.
Sleep scientists believe that sleep paralysis may occur when the transitions in and out of REM sleep and other sleep stages don't go smoothly. The paralysis that is typically confined to REM sleep spills over to other sleep stages -- and if you wake, you become aware of your body's paralysis, and the frightening feeling of being unable to move or to speak.