Look at the animation below and stare at the green flashing dot. Within a few seconds some or all of the yellow dots should disappear.

Here is a small animation that will let you detect your blind spot. All you have to do is close your left eye and look at the small circle with your right eye. At some point you will see the large circle simply vanish – and that is your blind spot in action!

The best Superbowl commercial from 2011:

Take a close look, the gray squares marked A and B are both the same shade of gray. This is caused by the effect of a shadow darkening the surrounding squares.

The length of a film should be directly related to the endurance of the human bladder.

— Alfred Hitchcock