[Vob]

While riding in the back of the patrol car handcuffed the arresting officer was force to brake had to avoid hitting a small child that was sleep walking and had crossed into the street. It was apparent that the sudden deceleration had caused the suspects head to impact the lexan spit shield rather violently.

vob

[Oatka]

It was apparent that the sudden deceleration had caused the suspects head to impact the lexan spit shield rather violently.

I've heard officers call it "The Screen Test" back when the barrier was heavy mesh wire.