"With the vehicle upside down, (that much water) would have been enough to completely immerse the interior of the vehicle, " Holt said.

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The top floors, accessible by both an interior staircase and a metal staircase outside, is dedicated completely to a master bedroom suite.

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And when left completely to his own devices Franco (who also writes) makes movies like Interior.

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The idea was to create a changeable interior, so all the seats can be flipped flat for sleeping, or folded out of the way completely.

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