Stereogram

 Rab showed me an video that tests which brain I use more. Though many section mates could see it spinning both clockwise and anti-clockwise, only clockwise could I. Actually, I had already known a video like that and I could have got it spinning both. The movie on the right is an ending animation of a famous work and, as you may see in the upper right of the box, there is a girl spinning. This has the same trick as the video and this is maybe easier to make sense. Yet, to go beyond just a surprise, an attitude that should be taken is that each person conceives that a phenomenon like that could happen every time around him. These videos are the evidences which shows that a person can easily be deceived. However, being deceived should not be counted as a sin, but how early he realizes it is more important because people cannot help making mistakes.