You shouldn't vomit in someone's car.
Lance has partied for most of the night and now feels pretty drunk and ready to go home.
Lance wants his friend to drive him back home.
Lance starts feeling really sick in the car and asks his friend to stop the car, so he can vomit by the side of the road.
Lance feels sick while he's in the car but does not tell his friend until it's too late - he profusely throws up in the car.
Lance's friend's car is spared and Lance's friend spends the next day relaxing.
Lance's friend has to spend hours the next day cleaning his car.