Stupidity: When Henry is talking to Nick, he feels himself beginning to change into Edward Hyde, he goes to his desk to inject the serum to stop his transformation. If he had injected himself before continuing the conversation, his transformation into Hyde would not have occurred.
Quantom X
23rd Aug 2018
The Mummy (2017)
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Suggested correction: The first time Henry felt himself about to change into Edward Hyde, he quickly took the injection so it's most likely he only takes it when he first feels the beginning of his transformation.