May have it on video, haven't had a chance to go through yet but I got a few incidents down the back straight on footage, once was a pretty close call between a couple of cars but can't remember what they were.
As for SONIC and full boost etc.. I would imagine boost levels would vary according to how many people are in the car as once it starts wheelspinning it's not exactly loaded up too much, the more weight, the more load, the more boost it makes..