Corry nods and looks at the doorway again. "I may be able to squeeze through and cut it from the other side - that would be easier..." he says as he starts to wriggle a bit at the door. "Please hold the doors open as far as you can. I don't fancy getting squished if I can help it!"

Spoiler: Mechanics
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Acrobatics check to squeeze through - either partially or wholly - to get at the rope to cut it: (1d20+5)[15]