This experiment never fails to fascinate me.
Always a fun experiment to perform on friends and family.
Now I'll get bonus points for knowing the name of this experiment, which I hear referenced and described quite often.
From the page: "Ordinary people, simply doing their jobs, and without any particular hostility on their part, can become agents in a terrible destructive process. Moreover, even when the destructive effects of their work become patently clear, and they are asked to carry out actions incompatible with fundamental standards of morality, relatively few people have the resources needed to resist authority.["