So perhaps I'm just missing something in the text, but it seems to me that there is no way to go negative on Hx other than during character creation. At the end of a session it says to just identify someone who understands you a little better and increase their Hx (rolling it over whenever it hits 4). Is there any mechanic to show people reaching an impasse, or that Hx get's worse?
I can understand why that wouldn't be the case, but I wanted to make sure I wasn't missing something.