Clint had his share of assholes (not like that, jesus,) in the past, and technically working with Stark meant he was likely to still have that in the future (yay, no change there). However, it hadn't really come to his attention that Sam was the 'lets just be a total see-you-next-Tuesday' about things, since the kid was far more 'save all the things' at the best of times.
"You know, I'm half tempted to let the place burn, but I'm a little worried about the carbon dioxide killing me before we get out -and by we I mean me." Because the little shit would get stuck to the door if Clint had his way right now.
"Okay," since Clint wasn't the 'freak out and panic' type of person (that was Jasper's role in things, and man did Clint wish he had Nat to snicker at some of the memories there) so it was a mostly casual stroll that had him checking behind the desk for a fire extinguisher (c'mon, even this place had to be anti-burn the place down, right?) before checking near the fire exits, "I'm going to assume that you're on you man-period, it's cool, some guys get them. And this place probably doesn't help. It's either that or you've regressed so far mentally that you're at the same developmental point as my kid." And even then Cooper wasn't dumb enough to burn shit in the same building he was in.
Grabbing the fire extinguisher, checking it over and making sure the small fire Sam ended up setting wasn't going to be a nightmare to contain, Clint just gave the other male a look of sheer boredom before blasting the fire. "You need a nap? Is it snack time?"