A driver jamming on the brakes when he noticed a speed-enforcement camera caused a 12-car accident on a Saudi Arabian highway that resulted in four injuries and a hospitalization, reports The Newspaper.

Eyewitnesses told local media that a car driving on King Fahd Road in Buraydah hit the brakes right as he came within view of the "Saher" photo radar unit.

The panic braking triggered a chain reaction of rear end collisions that included a police car.