This seems very interesting, and I have a, in my view, good plot idea that combines your idea with Vermillion's and Aliath's.
The quiet hoot echoes hauntingly in the forest.
Golden leaves fall slowly to the ground as the small group of teenagers pass by.
Why are they here, you ask? A Halloween dare.
A few of them shiver in their costumes, some try to run away from the group, but the claw-like branches of the trees soon drive them back to the group.
Soon they arrive at an old well, the stones falling away and covered with moss and vines.
A rusty railroad track, which had obviously not been used in years creaks, causing some of the people in the group to jump, and some of the girls to huddle closer together or with the boys.
Some of the boys give their jackets to the shivering girls, but some stay cold.
As the group approaches the well, a wolf howls close by, and then they begin to hear it. The growling.
Wolves step from the plants and shadows, surrounding the group and bringing them ever closer to the well.
Soon they are trying to climb on top of the well. As they climb, a stone slips out from under one of them, and the roof that so many are sitting on already gives. The last few that remain standing outside of the well begin to scream, and the wolves pounce, knocking them down the well as well.
Unfortunately, no one could hear their screams.