DIMMOOOOOOOOOOOON

A small, dark-colored animal, possibly a rodent, is seen clinging to a vertical pipe or wall inside a narrow, concrete-walled shaft. The animal moves upward along the pipe, then appears to fall or jump down into the shaft, disappearing from view as the camera tilts down to follow its descent. The setting is a confined, industrial-looking vertical space with concrete walls and a window at the top.