paragraph: A group of researchers at a remote jungle island outpost discover the natives are practicing voodoo and black magic . After killing the local priest , a voodoo curse begins to raise the dead to feed on the living in retribution . The researchers on the island are killed by the newly risen zombies , except for Jenny , the daughter of a scientist couple . She escapes , protected by an enchanted necklace charm given to her by her mother shortly before her death . She returns years later as an adult with a group of mercenaries to attempt to uncover what happened to her parents . Shortly after arriving at the island their boat 's engine dies , stranding them . Meanwhile elsewhere on the island a trio of hikers discover a cave , the same cave leading to the underground temple where the original curse was created . After accidentally reviving the curse , the dead once again return to kill any who trespass on their island . The mercenaries encounter their first zombie , who injures a member of the team . Taking shelter in the remains of the old research facilities medical quarters they are soon joined by Chuck , the only surviving hiker . Arming themselves with weapons left behind by the long dead research team , they make their stand as the dead once again rise . One by one they are injured or killed , one of whom sacrifices himself to blow up the medical facility and his newly undead team members . Jenny and Chuck flee , the only survivors remaining . They stumble upon the cave once again , where the zombies appear and attack . 
question: How many times does Chuck come across the cave where the voodoo curse was originally created?
answer: He stumbles upon the cave twice