<p>He has a few techniques. He uses the skill he grew up learning. As you know he is a con artist. So he uses a bunch of techniques from that. Also he understands ppl at their deepest core. The oldest part of the brain is the reptilian part. All active and reactive based on fears, needs, preceptions, and desires. He looks at the world through these lenses and then coupled with a basic understanding of body language and facial expressions helps him to predict that persons next possible moves. His ways of catching is essentially like gambling there is always chance which is where he gets his rush from and why he loves doing what he does but with more and more evidence that unfolds naturally he is able to predict way accurately based on small theories he formulates continuously throughout the whole process. This should get you started in the right path for understanding. </p>