I'm no physicist, but I read that the speed of light is constant from all observers (regardless of relative speed) and in doing a thought experiment I encountered a problem. Here is the situation: John shoots a laser at you. You turn and run away at near the speed of light, but you look back to see that the laser is still approaching you at the speed of light, unaffected by your speed. In order for that to happen it would seem that the beam has sped up to keep up with you. However, John does not see that the laser has sped up, but instead both you and the laser are traveling the almost the same speed. Now then, back into your point of view, you get hit by the laser and feel a burn. You immediately stop running because of the agony. In John's point of view, this laser has not yet hit you but you are already reacting to it. How can this be? Can somebody explain it to me? Furthermore, when John sees the laser hit you, will you feel it? It would then be as though you were hit by 2 lasers. Is this right or am I missing something?