Jean-Claude Van Damme lost his cool in a Los Angeles courtroom Wednesday. Frank Dux contends in his $1.5 million lawsuit that he co-wrote a screenplay that became “The Quest” and that the 38-year-old Belgian actor promised to share profits with him. Van Damme started shouting after Dux testified that the actor told him to stop dating his sister-in-law several years ago because Van Damme wanted to pursue her. “You can take my money, but don’t touch my family!” Van Damme yelled from his seat. His lawyer tried to calm him down, but Van Damme insisted: “I don’t care if I go to jail. I won’t take that from him.” Van Damme quieted down only after the judge stood up and yelled over the actor’s voice.