The Doctor had been about to respond with a jovial, 'Yes, I am indeed taking a holiday,' but was stalled when his attention was diverted as he glimpsed his eleventh self.

Three Doctors. Either they were all taking a holiday at once, or there was some sort of trouble afoot that he'd yet to sniff out.

Still, he smiled at both of his incarnations. "Hello, Doctors. How splendid that we all happen to be here at the same time. However, that leads me to wonder whether there's a particular reason for it."