When you go slower than 100x you can rewind the collision as far as you like so you dont need fraps running every second and editing it for the best bits
and since it's crashes are likely to be the most amazing feature of this game, it will be highly desirable to replay them from multiple angles and in slo-mo. it has not been implemented fully in NCG yet, so you have to watch the entire replay just to see that spectacular crash on last lap.