Revealing mistakes: In the final scene Angela repeatedly rewinds the tape recorder to sample snippets of dialogue but she should be fast-forwarding it instead since the recording is a diary describing events in chronological order. Watch the tape reel when she rewinds the tape. As it plays forward the reel turns more times than it was rewound. It is impossible for her to hear very much different dialogue without rewinding the tape much more than she does, and then it wouldn't make sense as the dialogue is chronological. In reality, she would be hearing the same spoken passage repeatedly.
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