Gabriel ate the food Sam came back with and immediately fell back asleep. A few minutes later, his face was scrunched and he was holding his head. Apparently, you can get headaches while you're asleep. Sam tried to very gently stroke his hair, hoping it would go away. Finally, he had to rustle through the bag and found a bottle of ibuprofen at the bottom labeled, "If you ever get sick of his whining."
Two tablets, and a small glass of water from the sink later, Gabriel was back asleep. Sam realized it had been quite awhile since he had slept too, but since their room was in the center of the building wit no windows or clocks, he couldn't place how long. Another disorienting tactic. He decided to lay down on the single bed, back-to-back with Gabriel, and try to sleep. Even if I oversleep, it won't matter. We have enough food for a few days. The Demons probably have keys to this door, but they haven't tried to use them yet. Maybe we are safe enough for now.
Suddenly Gabriel clutching him in his sleep as he whimpered softly. Sam stroked his head and tried to make the headaches go away. It was definitely time for some sleep.
Dean decided to crawl through the air ducts anyway. He came back a few minutes later, mumbling something about a fork in the duct work.
"What?" Castiel yelled up.
"I said, there's a fork in the duct work, and I don't think it leads anywhere good. Maybe I should stay up here and you can yell for help."
"Dean, this part of the building is practically abandoned!"
"Tell them you were looking for toilet paper!"
"Fine, but don't say I didn't warn you!" Castiel's cries of help were so deafening that Dean had to curl up in a ball, even in the ducts. But it only took five minutes for them to stop. Dean pressed his ear to the celing below, hoping to scope out their situation.
"No, Inias, I was just looking for some toilet paper."
"All I'm saying Castiel is that you were in that closet for a long time."
"Well look around, there's no one else here. Now let me out, or I will make sure that you never question me again."
"No need for that, just try to remember that this closet locks. And I think Michael wants to see you."
"Thank you, now go away." Inias seemed to have run away, judging by the speed of the very soft footsteps Dean could hear. "You can come down now, there's no one to catch us."
Dean jumped down from the ceiling. "Cas, I thought you said the vents just lead outside.'
"Well they do?"
"Apparently not. Anyway, I need to go 'join.' You should definitely find Michael. Ac-"
"Dean, he's my brother. You go hide, and I will do my best to act like the dutiful little brother I've always been. He has always spared from the worst of it for some reason, and he may still have a soft spot for me. Now get lost so I don't have to eliminate you as a spy." Castiel's trench coat swept behind him as he sped away.
Dean ran away, wondering why the air ducts would even have detours.