Jonathan Pritchard reads minds. Not in a vague, theatrical way. In a specific, verifiable, sitting-in-someone's-living-room-watching-his-hands way.
The show is interactive. He'll work with people in the room, not at them. Participation is always voluntary. Nobody gets embarrassed. Most people end up wishing they had volunteered.
The small setting makes it more surprising, not less. There's nowhere to hide anything.