Book Test Mentalism Trick That Fools Magicians

Theo (Ted) Annemann is probably the most well know mentalist of all time - and one of the greatest performers. He wrote many books about mental magic secrets that are still used today.
In 1929, he published his Premier Book Test that uses a method very few know about. In this video I show you how to perform it.
PS: If you watch until the end, you will see another blooper clip. (Watch the curtain on the left. Still not sure how that happened!)