Most people are familiar with some version of "hypnosis" -- at least as it's portrayed in fiction. But what is hypnosis, exactly? Why did this fancy name for a trance state become such an infamous term, and why have so many people made extravagant claims about the concept? In tonight's episode, Ben, Matt and Noel explore the fact and fiction surrounding 'hypnosis' -- spoiler: the trance state is real, and a lot of people conspire to make money off it.