But what’s happening here is a little more complicated. According to Veritasium—aka Derek Muller—the force of the vertical water stream perpetually pushes the ball up and away from the stream, but also makes the ball spin. As it spins, it creates a spray of water that’s thrown over and down the other side of the ball, creating another counter-force that pushes the ball up and back towards the stream of water. All of those forces end up working together in equilibrium, automatically correcting each other so that the ball appears to somehow float on the side of the stream.