Livingston's radio and gun. The now-sociopathic Jack fails to convince him to continue with the expedition, so he paralyzes Gordon using a previously collected spider to stop him from informing the others. Jack joins the others at the raft, but a suspicious Sam discovers Gordon and the spider bite. An anaconda swallows Gordon alive as she informs the others, who arrive as it finishes. Bill sets the building on fire, but notices the snake has escaped. Jack, left alone, steals the raft. Unable to make another raft, they hack through the jungle to beat Jack to the orchids and retrieve their raft. On the way, they fall into a cave trying to escape from an anaconda. Cole gets lost and finds human skeletons. He is found by Tran, who then gets pulled under and eaten. Bill, looking for the two, finds Tran's lost flashlight floating in bloody water. A terrified Cole escapes from the cave, seconds ahead of the snake, which gets stuck in the hole. Sam beheads it with a machete, but another snake captures the hysterical Cole. The team follows to find him being constricted. Bill throws his knife and impales the snake through the head, freeing Cole. The group finds Jack and his raft. Jack shoots Bill in the arm to keep him from attacking and forces the party to accompany him to the orchids, which grow above a pit in which a ball of male anacondas are mating with the female. Sam is forced to cross the pit via a thin log to fill a backpack with orchids. As she returns, the log cracks. Jack orders her to throw him the backpack. Sam threatens to drop the flowers into the pit, but Jack threatens to shoot the others in response. The log breaks. As the others try to reach Sam, Jack reaches for the backpack. The spider he used earlier escapes from its jar and bites him. He falls into the pit and is devoured. The vine holding Sam also gives way, but she climbs out of the pit as one of the anacondas tries to get her. Gail tricks the snake into biting their fuel container. Bill shoots it, but the gun is empty. Cole shoots a flare, setting the anaconda on fire and exploding the container, killing the other snakes. An ensuing landslide buries the blood orchids. The survivors—Bill, Sam, Cole and Gail—make it