Ahahahaha, damn it! Think I broke it right at the finish line!
I slapped into the finish line's pole on the 49th lap and reversed over the finish line. Then I had to drive forwards (going the wrong way on the track) to get my bearing, and it ticked over to lap 50 when I crossed the line again! All I could do was keep driving in slowmo until I finally carked it.
Awesome game mate, I really like this take on the "Time trial ghosts" concept!
Even if you try to cheese it by driving slowly and orderly, every little difference between the laps builds up and soon you find yourself surrounded on all sides, haha!