My name is Mr. Marick.
Today, I’ll show you some wonderful magic. Let’s do it together.

First, put your arms out in front of you. The right arm must be as long as the left arm.

Second, choose one arm and swing it very hard. Do it about thirty times.

Next, put your arms in front again and watch them. How are they?
Are they the same? Or does one arm seem shorter than the other one?

I have done this magic trick many times. Please do it in front of many people. Enjoy it!