Jena perry meets volunteer who says he left yale not knowing that the shocks hadn't been real. He described how conflicted he felt during the experiment, because he didn't know which cues he should be paying attention to. None of these things were present in the official accounts of the experiment. So it really forced me to go back to the archives and start double check the descriptions,. The published descriptions that milgrim had given, and start to compare them with the audio recordings of the experiments themselves. You listened to about 200 hours of them.