That's good enough for Winter; if he didn't cause the damage, he's not going to fret about it. "Make sure you don't leave any glass in there," he warns, though.

Then he gives Crowley's left cheekbone a narrow look in the midst of coiling up the light string. "And I don't want anyone else mucking around in my head. Thanks." There are very few things he really wants, but having his head left alone is one of them.