In this task, you will be shown an extract from a movie plot and a question. You need to provide the correct answer for it. Short answers containing words that are present in the passage are preferred.

Let me give you an example: Twenty-year-old Will Hunting of South Boston is a self-taught, genius-level intellect, though he works as a janitor at the Massachusetts Institute of Technology and spends his free time drinking with his friends, Chuckie (Ben Affleck), Billy (Cole Hauser) and Morgan (Casey Affleck). When Professor Gerald Lambeau (Stellan Skarsgard) posts a difficult mathematics problem as a challenge for his graduate students, Will solves the problem anonymously, stunning both the graduate students and Lambeau himself. As a challenge to the unknown genius, Lambeau posts an even more difficult problem. Lambeau chances upon Will solving the problem but Will flees the scene. That night at a bar, Will meets Skylar (Minnie Driver), a British student about to graduate from Harvard, who plans on attending medical school at Stanford and gives Will her phone number before leaving., Question: How old is Will Hunting in the movie ?
The answer to this example can be: Answer: Twenty years
Here is why: This is a good example which results in a factoid answer.

OK. solve this:
A young couple named Jim and Lori loses control of their motorbike while riding in a forest. With Jim hurt, Lori find no help and return, only to find Jim dead hanging from a tree before she is killed by a trap full of sharp objects. Weeks later, a group of campers consisted of Dennis, Margaret, Wendy, Marco, Nathaniel, Boone, Eggar, Vanessa, Mike, and Melanie, arrive at the forest. The group makes a clearing and spend the night around a bonfire telling a story; a young woman was raped and became insane enough to flee into the forest.The next morning, the group discover the next morning that Marco and Eggar missing. While the others search for them, Mike takes a swim with Melanie and later have sex, during which Mike is stabbed to death by an camouflaged killer and kidnaps Melanie. Nathaniel and Dennis find an abandoned cabin containing an old grave. Dennis enters the cabin and Nathaniel hears him scream, only for it to be a prank by Dennis trying to scare him. While searching the cabin for food and items, they find a severed wolf's head in a cabinet and are shaken before returning to the camp.That night, the killer appears near Margaret in her sleep and she hysterically tells the others what she saw. The campers also find Marco, who has returned to the camp. After Vanessa gets angry at the men for scaring the girls, she walks off alone to the outhouse; she screams when Mike's severed head falls onto her, and the group comes to her aid. The group spends one more night at the camp, and they find no successful search for Melanie who they assumed was still with Mike. In the morning, they go to the cabin to find the killer, unbeknownst is down in the basement with a captured Melanie, and they flee with the rafts after finding a human hand jar. While rafting along the river, the body of Melanie is tossed onto the boat by the killer and causes panic among the group. Burying Melanie near the river, the group continues on to the end of the river and find their empty, broken-down bus. They spend the night there, but the killer attacks and gets inside the bus before the group escapes out the back door. Wendy gets separated and is slashed by the creature, where the group comes to her and gives her first aid.The group gathers supplies and camouflage themselves. Dennis climbs one of the highest trees, where he sets a spiked log trap. Marco begins calling out for Eggar, who appears and begins to strangle Marco. The group attacks Eggar, suspecting him as the killer. While Dennis is watching the rest of the group fight, the killer murders him from behind and rises up to scream; it is revealed that Eggar's missing mother is the killer. As she walks down to the group, she accidentally sets off the trap and is brutally impaled to her death. The film ends with the group watching in horror, as Eggar's mother hangs dead in the trap., Question: What do Jim and Lori lose control of while riding through the forest?
Answer:
Answer: Motorbike