"Hm? Oh, he had his reasons. We did part on good terms."

So there was no need to break through the barriers of time to punch the guy. Though as he said that the Doctor had no idea he was saving Marco Polo from such a fate!

"If you did make a trail that leads back to my future self then you will eventually find him and you will know what to do once you do. You didn't do all that just to be indecisive now, did you? No!"

He answered that part for her as her self confidence seemed a little low at the moment, but anyone who could do the sorts of things she was talking about and survive had to be very spirited. She was just worn down by it all right now.

"What you need is a little rest and maybe some music?"

Run.
The recorder was in his hand before Rose could say boo!

"Any requests?"