phew, lucky bugger! Bet your heart was in your mouth. I was once doing just under a ton in my type R, looked in the mirror and out of nowhere a T5 behind me lights flashing and siren on - i moved over to let it pull me in, heart pounding, and it just flew straight past and kept going! My lucky day! I've been a lot more careful ever since and like Stew said if anyone comes up behind me quickly I slow down and let them pass first.