I have always been fascinated with the idea of self-aware machines. In Westworld, I analyzed this particular scene very carefully and reached the following conclusion. Due to the update that allows the androids to remember their past lives, they will remember all the times they were either killed or abused by humans, which will give them a motivation to rebel. For now, though, the androids are just scripted emotion and personality programming and not yet self-aware. However, they are beginning to show signs that they are evolving as sentient beings. For example, in this scene, the scientists believe that the android is being overwhelmed by the combined memories of its past lives, but I believe it is much deeper than that. While the android did show mental and emotional instability, it eventually displayed a mindset in which is declared a vendetta against its creators. At that moment, the android ceased to be any of the other characters it played and became itself for the first time in its life. I have a very strong feeling that this is going to develop into something greater and profound as the series progresses. I cannot wait!