I have watched that video. The small version. Network here at work is incredibly slow, and didn't have the patience to wait for the HD download...lol. But I never noticed the where abouts of the motion sensor and how much open space there would be surrounding it after the case was closed. That was just one of the disclaimers I tried to throw in there.
....Light travels faster than sound. That's why some people appear bright until you hear them speak.