Alice observes the strange small goblins back in the cave when she is startled by the huge snake
Whoa where did this thing come from!? Doesn't even have ears! Nope, I'm out!

Alice uses Disengage as a bonus action, backs off East 10ft and shoots the snake with her bow. Then she retreats a little further N to the place signaled by Yulya on the N wall of the passage as the light goes out, a little east of Yulya