Basic idea: It’s like Who’s Afraid Of Virginia Woolf: The Car Game! The bigger the group, the better.
Suggested Rules: You need a quarter, and some shady fellow passengers. Each turn comprises of two people -- the Questioner and the Answerer. The Questioner comes up with something dark, like, “Who here is most likely to marry a jerk?” The Questioner then whispers this question to the Answerer, who has to speak out loud the name of the person they think would do that. Then someone tosses the coin. If heads, the Answerer doesn’t do anything else. The question is never announced to the rest of the car, and it remains between the Questioner and the Answerer. Tails, the Answerer has to repeat the question out loud to the car -- so if you just answered that Jenny is most likely to do something terrible, now the whole car gets to know. The person who has gotten tails the least pays for gas, because now everyone is paranoid, thanks to them.