Don't Go in the Woods

As something kills a hysterical woman, and a Birdwatching, four friends (Peter, Joanne, Ingrid and Craig) trek through the wilderness. A tourist is thrown over a waterfall (landing near some oblivious frolickers) and his mother is wounded, and dragged away. The four backpackers set up camp for the night, and elsewhere a pair of honeymooners are attacked in their van and murdered. The next day, the two couples continue their hike, while an artist is stabbed to death, and her young daughter is taken.