Plot Hole (SPOILER, obviously)
At the end, the movie reveals that this experiment was just one of many around the world. But how can they make it so that every one of them finish at the exact same time?
shareThere were time limits imposed on each stage of the experiment where X number of people had to be killed. So if they all started at the same time and ran to the same schedule, it's possible some of the experiments may have concluded around the same time, especially if the people running it kill off everyone when the kill quotas are not met.
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