Little Shop of Physics

I did the "Rubber Pencil" experiment. It was quite entertaining. A good way to pass time when you are board.

According to the site this is what happens.
"The monitor redraws the screen from top to bottom at a rate near 60 Hz. This means that it will act like a strobe light, and allow you to "stop" fast motion. But since it is drawn from top to bottom, it will stop the motion at different points! So it will look like the pencil has curved: the top will be stopped at one time, and the bottom at another time!"

This makes sense and I found that it also works not in front of the computer screen, just not quite as well but still entertaining none the less.