A California motorcyclist has filed a federal lawsuit against General Motors after being involved in an accident with a self-driving Cruise AV.

Oscar Nilsson filed the lawsuit in the U.S. District Court for the Northern District of California, claiming that the autonomous vehicle “suddenly veered” into his lane and knocked him to the ground. Nilsson “suffered injuries to his neck and shoulder and will require lengthy treatment,” according to the lawsuit.

At the time of the accident, a man was in the driver’s seat of the Cruise AV, but he had the vehicle in self-driving mode, according to the lawsuit.

“As a result of such negligent driving, Mr. Nilsson sustained serious injuries of body and mind and incurred expenses for medical care and [work] attendance, all to the great detriment of Mr. Nilsson for past, present and future damages,” the lawsuit states.

According to an article in the Washington Post, however, the San Francisco Police Department determined that Nilsson was at fault, for attempting to pass another vehicle on the right before it was safe.