Well marked roads through deep forests can peter out into a tangle of undergrowth.
If you are sensible, you turn back.
I am not sensible.
The rule that you work you way downhill if you are lost fails when you find a deep ravine across your path where the banks are too steep for you to climb down and up the other side.
If you do get down into a ravine you can follow the water course down, but if you get to an impassable bit and the banks are too steep to climb out you will have to climb back up against the flow.
Wet branches are very slippy.
Bendy branches will whip back in your face unless you make sure they are well behind you before you let go.
Walking poles with sharp points are very useful when descending steep slopes with wet leaves or loose scree.
When you finally break out through the trees, you will be rewarded with a panoramic view of pine-clad mountains, green meadows and flower-bedecked wooden chalets and it will have been worth the climb.
Don't take guests on walks unless you are already familiar with them (the walks, not the guests.)