[quote=@Necroes]
Well, at least at present, the ork and the magos are taking part in an old-fashioned mexican standoff...

So, may be a minute before they find anyone.
[/quote]

As a friend in my saturday roleplaying group said.

"A mexicanicum standoff." :P

[@BCTheEntity] As [@Wraithblade6] mentioned, probably a missed opportunity. But yeah, it's not overly logical to chase half seen shadows in a pit.

And being a techmarine in power armour, you can easily badass your way out of that pit. Even if your arms are mangled.
Since it can easily lift your entire weight, combined with mag boots (unless you have a thunder pattern power armour, which you don't) you can climb your way up. Or talk your way out.
Not the pit, but a fight.