Yeah, I know what you mean DW. The sight of Marda dropping has him thinking on what to do. He saw the back door close on its own. He hears voices back there. Knows there are at least 3 enemies in the back.
The inside is cleared out, no more foes to face. Front door was blocked by the big guy, who now had cleaved into his friend Marda. There is nothing he could have done really, as he was set to guard the rear door and watch over Crystin. Even told to do so by Barrik.
He's helped, taking out the skeltons and giving Marda and Shade a little boost in performance. This round, things changed, and we'll see how he reacts.