Ah, yes, you could say I'm fixated on it - it's currently giving me inspiration for my own projects, plus there seems to be still enough content for me to explore. Like a whole freaking route I didn't even know existed! It even has its own little loading animation, damn! It's so weird to see a new loading screen after having played this for a whole month, and it's not even new content.
So yeah, I checked out both Bjorn and Devon approaches to Klaus's route. Doesn't really change much whichever you choose, but it was nice to see that Devon would look if you disappeared - made me feel better about Arvo following Klaus into a lonely shack in the middle of nowhere. Either way, was nice to get a proper glimpse at Arvo being a massive penis to Mikko with his friends.
Also, I have an answer to your initial question.
I decided to be smart about it - I figured out how to butcher the game and looked into the script. No, there's no way to activate any other actions in that scene. "Run away" is literally the only option coded into the game. Maybe something else is planned, maybe it's just to give you an illusion of taking action - who knows.
Thanks for showing me this route, would have taken me some time before I'd have found it on my own and it wouldn't be any time soon.