1) at the speed of light for 1km and stop

2) at the speed of light for 1cm and stop.

3) at the speed of light for 0.0000000001cm and stop.

and eventually

4) at the speed of light for 0 unit and stop completely (It accelerate without any limit for a distance of 0 = IE: both velocity/acceleration -> Unlimited; Travelling distance is approching 0

It sounds odd, but it seems like involving a lot of finite maths and calculus