WASHINGTON, Pa.—Police are investigating but have not yet charged a driver who's being accused of taking a mechanic on a wild ride in the bed of a pickup truck after a dispute over an unpaid bill for repairs at a western Pennsylvania garage.

Damon Lemasters tells reporters he jumped into the bed of the truck when he realized the customer wasn't going to pay the $1,500 tab for the repairs Tuesday at Fred's Automotive Garage in Washington, Pa. That's about 20 miles southwest of Pittsburgh.

Washington police tell The Associated Press they aren't identifying the driver, because they were still investigating the incident on Friday.

But Lemasters contends he was driven for several miles along Interstate 79 and persuaded the driver to stop about 20 miles away by kicking in the cab's back window and climbing into the passenger seat.