The document describes a card trick where the reader is asked to mentally select a card from a set in order to test if their thoughts can be controlled by the performer for a common goal. The performer claims they will try to control the reader's thoughts by having them select a card, after which the performer reveals if they were able to influence the selection.

1. Card Trick For us to be working towards a common goal I must control your thoughts so I will run a test to see if you can be controlled.

2. Now I will try to control your thoughts. Please mentally select a card from the following slide.

5. TA...DA