Viktor is also wearing a shirt. It's his. The jacket that covers it bears hardly a smudge, since he's only just returned, having been forced to retreat by rising coal dust. The cessation of scraping shovels has drawn him back—though only to the entranceway for now, with handkerchief judiciously in hand.

"If there's any blockage along the vent, it should become evident shortly."

Hopefully not; as much as he personally enjoys working out solutions, this particular problem would be a real pain in the ass to solve. These two have earned a little break, besides.