Sometime last week I turned both my computers off, thinking it would help me sleep. Of course it didn't, but I became aware that there's a wall clock in this room. You can only hear it when there's no other noise at all. I was just sitting in my beanbag bored staring at it and decided to try something --- I watched it until the second hand came around to the top, closed my eyes, and then I tapped my foot 60 times and opened my eyes. I was 2 seconds early.