a disintegrating door is propped in the deconsecrated churchyard. an unlabelled canister is bound to it, two steel rods rest upon the canister. a limb of angle iron, weighted with a shattered clinker brick is held on a pivot above the door. a length of twine, pulled out of shot starts the brick to swing on its arc. the can is struck and pierced. white hot resistance wire ignites the foam and propellant that explodes from the can. a mass slumps down the door, burning and charring the sticky surface.