As if driving on the highway wasn’t already fraught with enough danger, drivers in Oklahoma City got an extra scare on Wednesday morning.

According to the Oklahoma Highway Patrol, two youths were allegedly throwing chunks of concrete at cars and trucks driving along Interstate 44.

Six cars suffered dents and smashed windows. Several tractor-trailers were also targeted, but no damage reports on those were released.

The two juveniles are now in custody. No one was injured during the spree.