I was watching a programme in which Hawking played a part. In it we had a train going close to the speed of light and someone walking up and down.
My puzzle is this. Nothing can go faster than the speed of light but in the body of the person walking up and down are all these molecules with electrons spinning around the nuclei and at some point in their spinning they will momentarily be traveling in the molecule in the body in the direction the whole body is moving. Given that the electrons would be moving at the speed of light, or close to it, an electron would exceed in absolute terms the speed of light. So what happens to the electrons in that situation, or what happens in the molecule? Or am I all wrong.
