The outdoor scene in which Xander sees Buffy in the sandbox was intentionally overexposed, intensifying the foreground and blowing out the background, making the sky look white; flash frames were also used in the shot of Buffy in the desert. Whedon allowed some shots to last far longer than is common in a television episode; this cinematic technique allowed the images to take on meaning. Highly stylized lighting is used throughout Xander's dream. In the university hallway the scene is lit with green and orange gels, while the almost shot-for-shot re-creation of the "Apocalypse Now" section is lit with carefully controlled spotlights which allow the background to fall out to black. Whedon cites "The Limey" as an inspiration for the unnaturally colored university sequence, and had the scene from "Apocalypse Now" playing on tape during filming to ensure as close a match as possible for that sequence. When Xander is driving the ice cream truck with Anya, the backgrounds outside the car intentionally look fake, to give a sense of stillness where there should be motion. Whedon originally wanted to use rear-screen projection for the driving scene, but had to utilize greenscreen instead, as rear-screen projection would be difficult to set up on their stages. Some special effects shots came about by accident; in his commentary Whedon explains that when Buffy smeared the mud all over her face, it looked as though she was giving herself a facial. He therefore dissolved the shot into a negative image, creating intense colors that made the shot more interesting.