When the Moon hits your eye like a big pizza pie that’s a… Moonfall, the new disaster movie from Roland Emmerich in which the Moon – for reasons that are not yet clear – falls out of the sky and crashes to Earth. Such a premise raises inevitable questions. How has the Moon fallen out of its orbit? What does that mean for the Earth? How can it be stopped? And most importantly of all, should we be staring up at our own real-life Moon, shaking our fists and shouting at it to stay where it belongs?