Trivia: One of the reasons that Eric Stoltz was fired from BTTF is because he took the role too seriously and had no comedic instinct. But there were other reasons, too. Following his method-acting chops, Stoltz was always in character; he insisted on being called "Marty" all the time, both on and off the set; and he was always trying seduce Lea Thompson, which made the cast and crew leery of him. Also, Eric would not fake a punch; he made full contact in fight scenes, because he believed it was the only way to achieve realism. Co-star Thomas F. Wilson (who played Biff Tannen) said he was very pissed off that Eric Stoltz kept slamming him full-force in the cafeteria scene, take-after-take, until Wilson's shoulder and collarbone were bruised. In fact, the much larger Thomas Wilson had planned to give Eric Stoltz an actual beating in the parking scene at the school dance, in revenge. Fortunately for Eric Stoltz, he was fired from the role of Marty McFly before they filmed the parking scene, or Thomas Wilson may have killed him. Once Michael J. Fox was hired, everything went smoothly.