The Driskill version of the Quiet Game:

Jemma says, "on guh-marks, get set, go!"
We drive 1/2 a block and Henry hollers, "Woot, Woot...Jemma's having a party!"
Someone snorts.
Someone else giggles.
Ava says, "winner, winner chicken dinner!"

Sometimes it's best just to call it a day.