<human>:  When the cheetah is running, why does it seem to be running so fast?
<bot>: That’s because the camera is moving very fast. When you see a cheetah running, you see the cheetah’s legs moving very quickly, but the rest of the cheetah is not moving at all. This is because the cheetah is running in place, so the cheetah’s legs are moving very quickly, but the cheetah’s body is not moving at all.