Day 16: Wait, Where's Day 15?

A person in a teal shirt and dark shorts is seen from behind, pushing a wheeled walker down a brick-walled hallway toward an open doorway. The hallway has a brick wall on the left and a glass door on the right, with a white utility box mounted on the brick wall. The person is moving away from the camera, and the scene appears to be in a residential building with natural daylight coming through the glass door.