Facts~ on Instagram: "No tipping required! Watch this trailer unload itself. You are looking at a "Walking Floor" (or Moving Floor) system in action. This ingenious hydraulic mechanism allows massive trailers to unload bulk cargo like hay, wood chips, or waste without ever needing to lift the trailer bed. How does the floor "walk"? It might look like a conveyor belt, but it's actually a series of separate floor slats working on the principle of friction and reciprocating motion: The Big Push (0: