A federal air marshal who says he was seriously injured when a flight attendant deliberately smashed a beverage cart into him is suing Delta Air Lines and the crew member, a “Jane Doe” co-defendant in the suit, who allegedly preceded the attack with less forceful rammings and warnings that he and a fellow air marshal should “stay out of my way.”

According to a complaint filed in Fulton County Superior Court on Oct. 30, U.S. Air Marshal Harold Lamberson had to be helped off the plane and underwent surgery to repair his knee following the July 25, 2008, flight from Vienna, Austria, to Atlanta. He has since been unable to return to duty and is now working at a desk for a much lower salary, said attorney John A.B. Ayoub of Ayoub & Mansour, who filed the complaint along with Savannah lawyer Christopher H. Smith.