sense. The decisions, the choices, the selection of a potential, are in the hands of the subjects of his games and he only intervenes in order to keep the game within its rules so a decision can be reached. The subjects are faced with a shocking choice that forces them to acknowledge what Deleuze identifies as the virtual – that is, the unacknowledged aspects of our experience with reality. This, in effect, is the particular game that Jigsaw himself plays; one where the organism might be failing but the flow of desire succeeds and endures. Jigsaw might resort to discussing Darwin's "little trip to the Galapagos Islands" to provide a theoretical underpinning for his project and echo Nietzsche in talking of the will to survive, but this merely misdirects investigators and witnesses in the same way that the gruesome traps and freely flowing gore earn him his unsettling serial killer soubriquet. Jigsaw's games are designed to crack open the world of their respective players: the challenges are nearly always relevant to the subject's lifestyle in a symbolic or literal way, bringing them to painful self awareness, prompting a reappraisal of their squandered potential. John intends through these traps to force his victims to prove to him that they are "worthy" and "deserving" to continue living, and also for them to learn to abandon what he perceives to be their vices. He often expressed a desire for his victims to succeed, but stressed that their fate was always in their own hands. The video and audio tape instructions for his games often echo this idea: "Live or die. Make your choice." Billy, a puppet, is an icon of the Jigsaw character. John often used it for the purpose of delivering messages to his victims via a television screen, but at times it has also been physically present with the victims during their tests. He provided the (disguised) voice for Billy when it delivered its messages. It is shown in Saw IV that the original puppet was created by John as an intended toy for his unborn son Gideon, who died while Cecil Adams was robbing the clinic; Cecil accidentally pushed the door into Jill, which resulted in Gideon's death. John is shown constructing a more sinister Billy puppet in Saw III for the purpose of its inclusion in his "games". Microcassettes Another of John's trademarks is his use of microcassettes to