Airshark says:
... we didn't discuss it this time ...
:) Let's pretend y'all
did answer when I asked for marching order, and assume you are in that order based on what your characters knew at that time.
Airshark says:
... possible to walk side by side ...
It is reasonable for the corridors to be wide enough for people to pass each other in day-to-day activities, so at least as wide as normal passages in a modern home. Walking two-abreast would be possible (at least, where the stuff growing the passage does not encroach on that space), but weapons and gear would make that clumsy and drawing weapons would be more difficult (think 'two people sweeping the same passage floor'). Good military discipline would have you space out a bit, but do your characters value such things over the comfort of huddling together?
Airshark says:
... use athletics to manoeuvre ...
PbtA is always 'Fiction First', so you don't so much 'use athletics' as 'describe your character manoeuvring (in an athletic manner:)', and, if a roll is called for the nature of the description dictates what aspects of your sheet have mechanical effects.
Being 'athletic' is part of
Roald's character description, so doing exactly that is the sort of thing we would expect from him.
Stampman49 says:
... go to the front ...
From what we saw before,
Falur was near the 'front of the marching order', but 'front' can also mean 'where the action is', so yeah. :)
I don't know where
Deoring was positioned, but the head of the column had passed the creature by the time it reared up and went for him. So you all sorta have it surrounded and can all get to it without too much struggle (there are other ways to interpret that fact, too, though:).
TheGenerator says:
... a sling ... don't think it's easy to use in this hallway ...
The size of weapons, or how much space the takes to use, is definitely a factor in narrow spaces. There are reasons to want smaller weapons at times.
This corridor is not so narrow that it majorly hinders medium length weapons, but anything longer than one's arm will be at a disadvantage and shorter ones may get a slight edge (probably not enough to justify swapping to a dagger over a sword, though).