"And what if you set off the sprinkler system?" he retorts. "You know how to turn it off? 'Cause I don't."

"Come out when you're done. I'm gonna make a couple of phone calls," Dean says as he puts the clothes down and heads out of the room. Then he's leaning against the wall opposite, and calling Sam. A little bit of checking that indeed they were on the way home and that Amy was doing the driving, he filled him in so he wouldn't get blindsided by Jo's presence.

That call done, he calls Castiel next, fills him in, and asks him to swing by as certain people apparently have to let their inner pyro out.