A homeless man was arraigned Friday on charges he helped steal a Dorchester pizza guy's car Wednesday night, then promptly flipped it onto its side two blocks away, the Suffolk County District Attorney's office reports.

Edward Corbett, 19, was ordered held in lieu of $5,000 bail on a variety of charges, including carjacking and OUI, the DA's office says, adding he already had a suspended license.

According to prosecutors, Corbett and an accomplice - who is still at large - approached the delivery man as he exited his 1999 Suzuki Esteem around 9 p.m. on Columbia Road near Quincy Street and asked if he were a cab driver: "The victim, who had a pizza in one hand and his car keys in the other, responded that he was not. Corbett's associate at that point produced a baseball bat and struck the victim in the back, the victim said. Corbett allegedly took the victim's keys and drove off, while his associate fled on foot."

The accomplice is described as a skinny white guy with blond hair, about 6'2" and wearing a black jacket and blue jeans.

Prosecutors say Corbett didn't get that far: After colliding with two parked cars, he managed to crash the car and turn it on its side at Magnolia and Quincy streets.

As firefighters were extricating the alleged carjacker, the delivery man ran up and told police what had happened.

The delivery man was taken to Tufts Medical Center for treatment; Corbett was transported to Boston Medical Center.