Briggs' mood has more to do with the increasingly uncomfortable feeling the drugs are causing. It's shifted painful at the slightest touch. He groans into his hands then finally looks up.

"I hear you, brother. Might as well make his life hell while we got the chance, right?" Inwardly, he still has no intention of leaving without Mike if they make it that far.

Mike's thought about gas will turn out to be correct. The effects come slower because of the clogging of the vents. But it still comes. A faint chemical smell is the only tell that something is getting in. It's the same as what was used on Mike before and what is currently nearly immobilizing Briggs. The added dose is slowly making Briggs' condition worse.