We could have bets, like on pooh sticks - whos wheels will be gone first...then whos spoiler, then the bumpers.
Overall winner is the one whos whole car gets taken, in the event that no cars get completely taken, the winner is chosen by the insurance claim value

Winners received consolences from the rest of the party and the chance to open an insurance claim and lose lots of money...
Hmm on second thoughts, that doesn't sound like a great game