While he was not exactly singing Broadway showtunes or Disney song, or whatever really peppy people did in overly morbid scenarios whilst still (somehow) being peoppy, Slav's distracted state still put him about five marks higher on the happy scale than the other three in the room.
For the most part, he tended to leave the thoughts of how the world was going to end right-the-hell-now, or everyone's going to eat each other's brains, to Gor and Nik. They were experienced in matters of doomed cynicism/emotasticness. Now? Yeah, now he could indulge in a little bit of moping, partly because he had gone so long without his hands either in or on a car and he was practically going into withdrawal symptoms there.
Slav sat down beside Mary, with a short wave over at Maddie, who looked practically morose. Well, as morose as Maddie seemed to really get. Still, better than rants about alien overlords, right? Picking up his shot, he nodded at the obligatory toast. The youngest of the four threw back the shot, and wrinkled his nose with a shake of his head, as he remembered that he did not particularly care for alcohol straight up. And yes, the Oldest's warning/command still lay in the back of his head.