But who on this board would have nothing but 2 Radians handy - don't we all have, like, at least 3x as many seats as we have kids?
Seriously though, threads like this make me feel relieved that I have almost-9YO's in boosters so there's no installations to worry about in the event of a zombie attack. And if for some reason I had to throw their boosters to slow the advancing zombies, I think I would even start up the car and tell my girls "scoot your rear ends all the way back, buckle up and make sure the lap belt doesn't ride up, and don't mess with the shoulder straps!" while stepping on the gas. Mind you, this is the ONLY type of scenario where they'd be in my car without boosters until they pass the 5-step test