Generate a question that has the following answer:  The Fall  for the following movie plot:  Douglas Quaid (Arnold Schwarzenegger) is a construction worker in the distant future. He is happily married to Lori (Sharon Stone), but is dissatisfied with his place in life. She teases him about a recurring nightmare about being on Mars with a beautiful woman who is not his wife. On the way to work he sees an advertisement on the subway TV for ReKall, Inc., a facility that implants fake memories of ideal vacations. Against the advice of his co-worker Harry (Robert Costanzo), Doug visits ReKall and orders a special package that will implant memories of an adventure trip on Mars as a secret agent. Before the procedure begins, he is asked to select a woman of his choice. He chooses a brunette, with an athletic body, and a sleazy and demure personality.Before the memory implantation procedure can begin, Quaid goes into a violent rage, ranting about his cover being blown and how men are coming to kill him. He tries to break free of his restraints, and the ReKall director tries to calm Quaid. Quaid responds by throttling him and muttering, "My name is not Quaid!" The technicians tranquilize him and he falls unconscious. The ReKall director believes that Doug was acting out the secret agent part of the trip, but learns that the memories have not yet been implanted. The technicians realize that Doug's memory had previously been erased. To cover their involvement, the ReKall director orders his team to erase his memories of Rekall, refund his credits, and send him home.Quaid awakens in a Johnny Cab that takes him to a subway station where he can catch a train home. While walking through the subway, he is attacked and detained by several men led by Harry, his co-worker. They accuse him of blabbing about Mars while he was at ReKall, although because ReKall erased his memory, Quaid cannot remember anything about ReKall or being on Mars. Harry prepares to shoot Quaid, but Quaid fights back, successfully killing off Harry and all of his men. He doesn't understand how he could have these skills and is horrified at his...
Answer:
What is the gravity elevator running through Earth's core called?