Hello Scott.
I just finished my first real readthrough of this game. Apparently, there is only one thing rules-wise that causes the condition "restrained" (Soul Siphon) and another one that causes "stunned" (Giant Snake). But what exactly causes "frightened"? (Failing a Cunning roll, perhaps?) And can you be incapacitated without being prone and/or dying? I assume the examples on the last page are really just examples to get players' imagination going and create more. There is one tiny typo under Incapacitated: "Drop eveyrthing" should be "Drop everything."