A wrecking ball wreaked havoc on a small college town in northwest Pennsylvania on Monday.
The 1,500-pound, 3-foot-wide ball broke loose from a crane cable and rolled nearly a mile downhill.
It smashed more than a dozen vehicles and injured three people as it bounced from curb to curb.
The ball slammed into the back of a car stopped at an intersection. The force caused a chain reaction with two other cars at the traffic light.
The driver, an Allegheny College junior, said he thought a car had hit him when his back windshield exploded.
The ball came to rest in the trunk of a car and pushed it nearly 20 feet.
Workers had been using the wrecking ball to demolish part of a library at Allegheny College when the cable snapped.