As Elon Musk put it, it's the difference between filling up your car at the end ...

		Florin_Andrei on April 23, 2013 \| parent \| context \| favorite \| on: SpaceX Grasshopper Flies High As Elon Musk put it, it's the difference between filling up your car at the end of a trip, and then going on another trip immediately, versus having to build a whole new car almost from scratch at the end of each trip.