What if we would be able to speed up and object to the the speed of light. Then at the speed of light that object could be moving only in one direction because otherwise it would need to move faster than the speed of light. Now say we would de-accelerate that object but so that the de-acceleration would only be in the opposite direction of the movement of the object and would cease when the objects velocity reached zero. Also let's assume that there are no other forces (gravity etc.) acting upon the object. Wouldn't that body now be standing completly still in the universe?