I can do this:
http://www.youtube.com/watch?v=WhCE_...eature=related
Funny thing. When I was in high school some guy pissed me off and I knew this freaked him out. So when he had to go in front of the class and give his presentation, I kept doing that. And it kept throwing him off.. he tried looking elsewhere and ignoring it, but kept coming back. He went to teacher afterwards and said his poor performance was because I "kept moving my eyes around". He got an F.