falling door

flap door

A small door, hinged horizontally along the bottom, that opens downward.
References in classic literature ?
She crept out-- Gagool; I did not see her, I was faint--and the door began to fall; then she came back, and was looking up the path--I saw her come in through the slowly falling door, and caught her and held her, and she stabbed me, and /I die/, Bougwan
So you need Co noc only worry about the door falling and conking someone on the head, which happened here, but also the danger of a Soldier geCCing his fingers caughc between the slots if he tried to catch a falling door.
I heard a crash and turned round to see men fleeing from the path of the falling door.