The whirring machine hums loudly in the room. It spins round and round, making a steady buzz. The machine’s metal body is big and strong, with many moving parts that click and clack. A thick cord snakes from it to a plug in the wall, sending power to keep it running. Occasionally, a small plastic piece falls out and rolls away across the floor. The smell of something warm and metallic hangs in the air around the machine.