Plot hole: The system providing oxygen can only be accessed by someone slim. Therefore John Goodman built the bunker with him unable to access the key facility that provides oxygen in his bunker. Yet he must have been able to go and get Britney when she went to that area?
10 Cloverfield Lane (2016)
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Directed by: Dan Trachtenberg
Starring: John Goodman, Mary Elizabeth Winstead, John Gallagher Jr., Jamie Clay
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Suggested correction: It's not a plot hole because he said in the film, the normal hatch to the air filtration was blocked by something that fell on top so they couldn't get through that way.
Howard: I'm sorry, but no one's looking for you.