Given the task definition and input, reply with output. In this task, five ordered key facts are given. All the given facts are expressed in natural language. Your job is to generate a story 100 to 1000 words long, that includes all the facts given as input in their order of appearance while expanding upon them to produce a broader, yet coherent, narrative.

Fact1: brothers love using Marshall him in stunts, Fact2: Marshall gets revenge on brothers pranks against him by pulling diminutive malicious stunts like cleaning toilet with brothers toothbrushes and filling canteens with downstream river water, Fact3: man was attacked by alligator, Fact4: Mark throws but it lands trying to retrieve it, Fact5: Phil was talking about cave full of hundreds of bears somewhere out West
In the summer of 1967, Marshall Stouffer is chased by his two older brothers, Mark and Marty; the brothers love using Marshall to film him in stunts, which he dislikes. Occasionally Marty and Mark will show footage of their antics in their garage to all their friends. Marshall repeatedly and secretly gets revenge on his brothers pranks against him by pulling diminutive malicious stunts like cleaning the toilet with his brothers toothbrushes and filling their canteens with downstream river water that they were at that current time urinating in. Mark and Marty have a dream of filming dangerous animals around the country, and the dream starts when they find a rare, special camera in a shop where they have their films developed. Much against their father Marty Sr.s recommendation, their mother Agnes loans them the money she was saving up and they begin planning their trip. Their father is against this idea. The three brothers start camping. First, they miss a shot at catching an eagle, then go to film some alligators, and start by seeing a man who was attacked by an alligator. As they go in a swamp on a boat, Mark throws some bait but it lands in the trees, trying to retrieve it, his clothing gets stuck in a branch underwater and he starts to drown, Marshall and Marty drive the boat in attempts to save him, but it crashes into another branch, which sends Marshall flying into the water. Marshall gets a knife from Marty and cuts Mark loose, but Marshall is now dealing with a bigger problem; he and the alligator are face to face. Marshall is able to get back on the boat in time. When they get back to the hut, the alligator man Strango tells them about how back when he served in the Korean War he befriended a fellow soldier named Phil. Strango and Phil would exchange stories about their wilderness adventures. Strango would talk about hunting alligators and Phil would tell tall tales about bears. This rouses Martys attention and he asks about it. Strango states that Phil was talking about a cave full of hundreds of bears somewhere out West. They drive northwest until they reach Devils Playground in Colorado, the last home of the wild American wolf. Devils Playground is located on government protected land. They catch footage of a wolf creeping up on a doe. Then as the wolf is about to ambush the doe there is a series of explosions. The brothers look up and see two F4 Phantoms flying overhead. The pilots see the brothers and turn around, firing missiles at them eventually hitting a giant boulder knocking the three down. As they get up a herd of wild horses comes thundering towards them. They get in the truck just in time to film it. When the horses pass Marshall sees an owl that looks a lot like his owl Leona. The three follow it and discover a cave. On the wall of the cave is an ancient Indian drawing of a cave filled with bearshaped figures. Marty and Mark draw it on Marshalls chest and show it to an old Indian woman. The woman tells them that its located near Arapaho Peak in Montana. They display their film at the school gym, and everyone claps, but when their adversarial affiliate DC makes a rude comment, their dad begins to applaud, having the crowd cheer and clap. DC, who is always being a devils advocate from the beginning, becomes the only one who wants his money back, which he gets from Marty Sr., but everyone else comments all of the brothers with compliments. Marshall and his Dad smile at each other.