Exactly what I was about to say!
One of Milgram's experiment was to play a game where a random subject (selected through ads in news papers) would play a teacher and an other random one the student. The student was tied to an electric chair. The student must learn a list of various words and after each mistake the teacher had to punish him.
At each mistake, the teacher had to press a button to give the student a shock. After each mistake, the teacher must increase the voltage.
First mistake : 15 volt
Mistake 8 : 120V
At this level, the average student will start saying that the shocks are painful.
The student would cry and ask to go and leave the experiment. At this point Milgram usually told the teachers to continue the experiment. Remember that the student is tied up.
350V The student doesnt answer any questions now.
450V The last shock.
Where would you stop?
Everybody said that they would stop before the student would feel pain.
Reality: 63% completed the experiment up to 450V!!