If you can travel back in time, you can travel faster than anything. But just because you can outrun your little sister in a foot race does NOT mean you are able to travel through time. I'm pretty sure you mean "puts the effect before the cause." But it doesn't. It puts the OBSERVATION of the effect before the OBSERVATION of the cause. If you are hit by an FTL bullet, that means you see the bullet before you see the person who fired it at you. Mathematically speaking, it IS an observational anomaly, and not a real one, because the anomaly works out in both directions. In the classical thought experiment you have two astronauts on a space ship: one ship accelerates to close to the speed of light, the other stays stationary. Both astronauts have a clock that keeps identical time. The observer on the speeding ship looks across the distance at his partner's clock notices HIS clock is running slower than the clock on the stationary ship. This is called "time dilation," and the theory is sometimes interpreted to mean that time has slowed down for the one who has accelerated. It is less often interpreted to mean that time would REVERSE if the accelerated astronaut somehow exceeded the speed of light. But it doesn't work that way in reality, because THERE IS NO UNIVERSAL REFERENCE FRAME. That means there is no UNIVERSAL truth as to which one of them is stationary; the accelerating ship may see his partner's clock running faster, but you run the equation from his partner's point of view and you discover that the stationary astronaut will see the exact same thing, that the ACCELERATED clock is now running faster. It works this way because acceleration isn't a factor in the equation, only relative velocity, and in special relativity it doesn't actually matter which space craft accelerated and which one remained stationary, or if they BOTH accelerated in opposite directions. Each sees the exact same thing: the other ship's clock is running faster than his own.