Let's assume I have a spaceship in front of me let's say at 1000000km distance. Now let's assume I have also a stationary wall just behind the spaceship at 999999km. Initially the spaceship's speed is 0.
Now let's accelerate the spaceship rapidly to relativistic speeds.
Due to the length contraction the spaceship and it's distance from me contracts.
Now I see a paradoxical situation: I and the wall is in the same frame of reference. From the wall's point of view the spaceship come closer to the wall momentarily and zips away. From my point of view the spaceship can come closer to me than the wall (due to length contraction rate ), effectively smacking into the wall during the acceleration.
How to resolve this apparent paradox?
(or where is the origin of the contraction?)