That's a really well made vid - never seen that before & see what you mean about the crashes - the Monaco one was hilarious.
I think you'll find that abrupt explosion at the Nurb, has to do with the nature of the collision boxes, which are built into each car model. Their physics can sometimes become extreme. You bottomed out in such a way as to incur the wrath of one of them.
It's possible, the original game was designed, to throw cars into an occasional 'loop,' as added entertainment for its younger audience. But more recent modeling seems to have removed much of that tendency. Unfortunately, it can still happen at the worst of moments - glad you survived!
Thanks Martin. I should really post the cockpit view though it wouldn't be recommended for anyone of a nervous disposition