That few seconds of acute worry means his brain has completely bypassed everything else that’s wrong. For starters, he can’t hear out of one of his ears, his head hurts, he thinks he may have broken a rib when he finally moves to try and figure out where the hell he is and, more importantly, where Cas is. He doesn’t make a sound though until he hits his head, metal clanging loudly as he realizes just what he's in. This isn’t the cabin, and it’s not the forest. It’s a cage.
He can feel the anger boiling up inside of him. This wasn’t supposed to happen, and even while he’s checking his pockets to see if he still has his cell phone on him, he’s cursing under his breath.