It's like a feather and a rock falling from the top of a tower. From the point of view of the feather, the top of the tower is moving upwards. But since the rock falls faster than the feather, the rock is moving downwards both from the point of view of the feather and the top of the tower. Nothing particularly mysterious about that.
- Jake If you only spend 20 minutes of the rest of your life on economics, go spend them here.
