Effects are an important element in the production of most episodes, and sometimes those effects must be performed practically. One of the largest stunts for the season was performed in "Exile", where two stunt men were dropped from 300 feet down to eight feet above the ground. The effect was used for the scene where Jonathan and Clark are fighting and fall from Lionel's office at LuthorCorp. Producer Bob Hargrove petitioned for the scene to be shot with real stuntmen, as opposed to using computer-generated effects, which was an idea that was being tossed around at the time of filming. During another fight scene, Kim Chang and Lorelei Connelly stepped in for Allison Mack and Kristin Kreuk for where Lana and Chloe get into a fight at school. The scene took two full days of shooting to complete, and involved many different angles to be shot. Close-ups of Mack and Kreuk were filmed of them fighting up to the point that a big fall would take place, and then Chang and Connelly would shoot the same actions from a further distance away and continue through the fall. Then, Mack would continue the fight scene with Chang, where they filmed just Allison Mack's side of the fight. As Mack tumbled over Chang filming would stop, with everyone frozen in their place, and Kreuk would replace Chang in the scene and filming would resume.