Albert-You know thats exactly how I feel about cards too, but to answer your question...Mentalism. Some people actually think its real, and alot of psychics use mentalism techniques to mislead people that what they are doing is real (which is wrong) Objects levitating or floating, most sensible people think "string", but reading someones mind or knowing a thought they are thinking can be really creepy for them. Most of the time people dont even applaude,like a magic effect. They look at each other in disbelief and thier mouths drop open, which for me is better

I always never claim to be a psychic, I attribute what happens to body language and psychology. I like saying things like "have you ever had deja vu, or has the phone ever rang and you know who it was before you answered it? These are real experiences that people can have.
Last year after a talent show where I did some mentalism, I had a lawyer come up to me and tell me she believed I had psychic abilitys, and wondered if I would consider working on some cases with her. She also knew I was a magician, but thought I could still read people( which I can).