ah... sorry. You were just kidding about the whole dying stuff. You breathe slowly in and out. The green vine drops completely off the branch. That was why it was going so slowly - it was dropping from a branch.
Anyway, you were hallucinating about the green vine (a.k.a. snake) opening its mouth and biting you. You shake your head and continue on your journey. There is a cave entrance to your south, a path to your east, and a tunnel to your west. What do you do?