i'll second that levitation recommendation... my wife did a baldaci levitation for one of her friends from Singapore (they kinda superstitious people by nature anyways) and she freaked out and started screaming and crying cause she was so scared!
it was one of those cool.. but bizarre awkward moments
she eventually got her calmed down by explaining how it was just an illusion and she didn't really float in the air. hehe
so try the levitation... and lead in with the mental magic.... tends to screw with peoples heads.