How Does Derren Brown Do It?

How does anyone read minds? Like Derren Brown or this:  The Revelation Effect - #1 Mentalism and Mind Reading Trick

• Like Derren Brown or this: http://www.therevelationeffect.com/?hop=iastalis

• Answer:

  There's two main techniques Derren uses to 'read minds'. Reading body language is one such technique.  By asking someone to concentrate on what they are trying to conceal, they involuntarily give away cues that help identify what it actually is.  Eye, hand movements, changes in intonation are all examples of body language that can help the mentalist to understand when they are close to the truth. The second and more insidious method is actually based on suggestion, ensuring the subject picks the correct number, colour, etc at the beginning and throughout the trick.  Derren uses this technique quite a lot, especially in tricks involving participants correctly arriving at a large and seemingly random number matching one in a sealed, tamper-proof envelope. The best way to learn these techniques is start with reading the basics on Suggestion and Body Language (Wiipedia is a great reference for these) to get a general idea on how these work.  Then armed with this, jump on YouTube and analyse how Derren and other mentalists perform their tricks.  Very quickly, you'll start to take note of the language, gestures, and surroundings used to achieve certain results. Personally, I'd stay away from scammy sites like the one in the original question.