[JET]

The special theory of relativity applies locally, but we do not know how it applies on a greater scale. We do not have a firm grasp on how space and time are related and the theory applies only to a spacetime area that is flat. Just like a circle, if you take an area small enough it is nearly flat (a tangent), but when you look at a larger area it is curved.

Spacetime may be just like this, but we do not know. Jumping between those points may make it appear to other observers that you are traveling faster than the speed of light. The Alcubierre warp bubble is a theory about this. There are tons of other theories too, but our knowledge is so limited on the subject that it is all speculation right now.