The Doctor has to smile a bit at Tony's cockiness. Not that it's unwarranted, of course - judging by this article, he's got a pretty intelligent head on his shoulders, probably cleverer than most in this city, present company excluded.

"No, see, if you just boost the auxiliary dampeners and invert the singularities, calibrate the power to avoid fluctuations in this region here, and any anomalies will sort themselves out," he explains, pointing at one of the pictures. "You save a lot of weight, and thereby fuel, and building expenses, and it's less likely to break."

What was that about launching things into space? The Doctor rolls up the magazine and stuffs it into his pocket, again without his coat showing any indication of it. This smile is not at all a gloating one. Not even slightly, nope.