Dramatic dashcam footage from the snowy hills of Pennsylvania reveals the terrifying speed of a highway pileup. Local police had set up a roadblock to deal with an earlier crash when a red pickup truck, unable to stop on the black ice, came barreling into the scene. The impact crushed a sedan and slammed into three parked squad cars. An officer narrowly escaped by jumping over a guardrail as the wreckage piled up. Miraculously, no life-threatening injuries were reported, though the wreckage clos