Don Hertzfeldt, who makes animation films by using stick figures, finds the possibility of animation not in literal visualization of fantasy as most animators do. Although he calls himself "a filmmaker who just happens to animate", what he does in his films can be considered to be a practice of what traditional animators like Norman McLaren or Yuri Norstein theoretically have pointed out on the simplicity in animation. Hertzfeldt's simple style of animation does not limit viewers' imaginations . By doing so, viewers can perceive the existence of a world that cannot be expressed visually.