Opal awoke with a start- exhausted in her trek, she had momentarily slipped into a dream of a hastily written and terribly vague puzzle that was based entirely too much on an improvised scene she had performed in college. She was glad to see that things in reality were at least somewhat different from the dream.
Opal and her guide Kimbe have been trekking through the jungle to the ceremonial cavern inside Mount Tarantoola, but have stopped to rest for the night. Just as Kimbe succeeds in starting a fire, the two trekkers hear the crack of a whip in the distance; they are being pursued by Whiplash McGrath, who is set on destroying Opal, Kimbe, and whatever they hope to find inside the fabled mountain. They won't be resting tonight.
The mountain lies in front of Kimbe and Opal, but between them and their destination are two furiously raging rivers, which they dare not wade through, as they are filled with leeches and piranhas of unhealthy sizes. A long-forming sand bar separates the two rivers.
In the glow of the fire, Kimbe can see what looks like four vines hanging over each river, but as he and Opal race to the closest riverbank, they see that this is not the case. Over the closer river there are only three vines, as well as a large snake, while the far river has only one vine and three snakes.
Snakes can be swung on in place of vines, but won't be happy about it, and must be scared off with the torch, an act which extinguishes the flame. They must move, but they also want to foil Whiplash's pursuit, not leaving any way for him to swing across safely.
Also to be considered is the following:
The trekkers have one match with which they can relight the torch. A lit torch is necessary to safely enter the cavern, the match is not.
Can Opal and Kimbe reach the mouth of the cavern safely, and prevent Whiplash from doing the same?
Snakes act as vines, assuming you have the means (a lit torch) to scare them. They may also be scared without swinging on them.
In this iteration the vines cannot be burned. Each vine/snake will only support one swing of one person.