Abstract: A drop down bumper suitable for attachment to a frame of a transportable container or to a truck. The drop down bumper is equipped with loading rollers and is movable between a folded position and an extended position. When the drop down bumper is in the extended position it serves as a conventional rear bumper to help prevent cars and other small vehicles from riding under the rear of the truck, or container loaded on a truck. When the drop down bumper is in the folded position it allows access to the rear portions of the truck, and provides rolling support for the transportable container when the transportable container is being loaded and unloaded. The drop down bumper comprises an impact protection bar, attached loading rollers, and a foldable linkage connecting the impact protection bar with the frame.