Sam doesn't want to tell her how long it's been. He's not sure if that makes it better or worse so instead he nods. "I drew these runes on everyone in sharpie marker to keep them from being noticed so we could slip inside. They're probably all still scrubbing runes off themselves." That reminds him that he's still got the key the Doctor gave him around his neck. He'll have to remember to give it back to him.