You can feel his presence. You may get a fleeting glimpse of... no, it’s gone. Was it a face in the leaves?
If you hear the sound of running water, run in the opposite direction. It is well known that BOKWUS lures travelers into rivers and they are never seen again. Quite how this can be so well-known when the victims are never seen again can only be further proof of how dangerous and mysterious BOKWUS is.