Officers say his Ford pickup ended up on top of a police cruiser.
Witnesses tell police in Frederick, Maryland, Head followed a Volkswagen Cabriolet after arguing with the driver in a tavern parking lot.
Police say he rammed the VW from behind, then accelerated rapidly in reverse.
Officers say Head's truck came to a stop on the hood on an unmarked cruiser.
Police say Head apparently wasn't aware the cruiser was behind him.
He's now facing drunk driving charges and other counts.
