[He just barely catches the motion out of the corner of his eye, but by the time Jamie turns to look, the Doctor's going on about sneezes, of all things.]

That's the most ridiculous thing I've ever heard, Doctor.

[There are times when Jamie wonders when exactly when it was the Doctor first went daft, and this is one of those. Still, looking at the box, he really can't come up with a better plan. With a resigned sigh, he tries to sneeze on the box, only to find that it's not really something he can simply do.]

How am I supposed to make myself sneeze when I've no need to?