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Knott produces a crowbar from his Backpack and tries to force open the door, but it soon becomes obvious that it cannot be prised open. A closer examination of the air vent reveals that it was once a much larger window that has recently been partially boarded over. Confident that you can gain entry this way, you tell Knott to attack the slats.
Within a minute he has made a hole large enough to climb through and, without hesitation, you scramble into the shelter through the jagged gap.