 Before McCoy is arrested by security , he attempts to charter a spaceflight to Genesis in a bar . The scene opens with two officers playing a World War I @-@ era dogfight video game . The wireframe biplanes were created using black lines on clear paper printouts placed on an overlay cell . " It was really just a gag shot " , effects artist Charlie Mullen explained , " the idea that people in the future would be playing an old war game . " To accommodate the effect , Correll had to use a large amount of exposure without making the bar appear overlit . Much of the lighting was provided by tables rigged with fluorescent tubes to provide an effect different from other parts of the film . Correll could not add smoke to the scene to enhance the bar " feel " , because the disturbed atmosphere would have made ILM 's game hard to insert . The scene was intended to end in a barroom brawl when security tried to take McCoy into custody ; Nimoy decided that " it didn 't feel right " and there was not enough time or money to achieve the scene successfully . 
