THORNTON, Colo. — A Thornton police officer got quite the surprise when he stopped to help a tour bus with blinking hazard lights early Tuesday.

“#TPDOfcSchaetzle rolls up on a tour bus with its hazards on and guess who pops out? None other than Clint Black! ‘Now who woulda thunk it!'” the police department tweeted.

Authorities didn’t release details on what exactly was wrong with the bus, but Black made sure to thank Officer Schaetzle for stopping to help.

He signed a copy of his new album and tweeted a thank you and special Fourth of July greeting to the Thornton Police Department.

Black is currently on tour for his new album. He’ll be back in Colorado for a show in Arvada on Saturday, August 19.