I while watching Ex Machina, I was caught up in the story and characters. Immediately afterwards, I realized how ridiculously contrived a few parts were.<p>(Spoilers follow.)<p>The most glaring oversight was the lack of an emergency shutdown for Ava. The story should have ended with Nathan pulling out a remote, pressing a button, and Ava collapsing. The prospect of a robot going berserk was known to him. Heck, it&#x27;d already happened before. One scene shows footage of a prototype smashing itself to bits on the wall. The movie expects us to believe that after that incident, Nathan thought, &quot;No need to add failsafes. Just let these AIs destroy my carefully-crafted robot bodies on this glass partition.&quot; I don&#x27;t buy it.