The day that happened was when Hell (or any remotely Hellish place) would freeze over. You don't get between a Doctor and his fashionably magnificent bowtie.

"I believe the technical term is 'giving it a nudge' or 'a gentle twiddle'," the Doctor corrected Zouichi. He didn't seem to mind too much about saying what he was -- it was the specifics about Gallifrey that wouldn't get his fellow crew-mate very far. "But I rather prefer just enjoying all of time and space, don't you?"