Seoraj's head comes up when the doors swing open, but it's difficult for him to make out what's going on past the metal bone in his way; he hears the noise, can tell there's movement, which direction...that the suddenly sharpened attention of the revelers is not presently on him. They're going in one direction, so he's moving in the other - careful, close to the wall.

The doors are open. They need to stay distracted; what distracted them is a secondary concern to feeling his way back towards a brazier he found earlier.