Exactly what wind can do?
Another pointer is that if you are flying with a tail wind, do not SLOW your airplane down or you could stall and crash. The airplane doesn't care about groundspeed (you as pilot do, though) but instead, relative airspeed, over the wings is what generates lift. At a given throttle setting you will have faster ground speed downwind than when you land upwind. This faster speed may be unsettling for beginners.