As we drove, the kids did a whole lot of screaming at each other, and "Stupid" was bandied about quite a bit, and there were several rounds of "No I didn't/Yes you did." Tensions ran especially high after we found a suitable tire and heaved it in, because all three of them wanted to touch the tire but only two of them could do it at once.
In the car, though, there's not a whole lot you can do. You can't send anyone to a different room, or take away a toy. So I just looked at Stupiddaddy and rolled my eyes.
"We need a Taser," he said.