At least it's not a closed space. That's the one relief in this whole thing. If they were somewhere confined, closed, and tight, Isaac doesn't know how much control he'd keep. His panic stays with him, though, when Adam mentions later, even if it's only a possibility. "And, what, I'm supposed to just stay like this? I'm pretty sure no one warned me this was a third setting of the werewolf thing, or my alpha definitely kept it from me."