Explaining Physics on Instagram: "The video demonstrates siphoning, a process driven by gravity and the principle of fluid dynamics. For a siphon to work, the hose must be completely filled with liquid (primed), and the outlet end must be lower than the liquid surface in the supply tank (the motorcycle fuel tank). Gravity pulls the liquid down the lower side of the hose, creating a partial vacuum at the highest point (the arch of the hose). The atmospheric pressure acting on the open surface of