Dean was steering the Impala down a dark country road towards Bobby's. He had been alone until a couple minutes ago, when Cas popped in. Dean could have said anything, and he hadn't. He didn't want to admit it, but Cas' weird behaviour had Sam and Bobby's warnings ringing in his head. He lied about where he was headed, what Sam was doing, about understanding why Cas had avoided them so much over the last few months. "But, Cas, you'll call, right? If you get into real trouble?"

Cas could have said anything, and he hadn't. He just flew off.