I don't think I was being paranoid....I'm generally a very, very fast driver who prefers the inner lane and 85mph+ speeds given the opportunity. I do know the car has amazing handling but it unequivocally started swerving heavily out of the lane at the speed it was traveling at.

It's route 90 between Allston and Back Bay. It looks like a pretty gentle curve so looking at the map certainly makes my description of events seem questionable, but I can only tell you that it occurred as I described.

I understand your skepticism.