The Master had almost said yes please to the question about the dinosaur, really more because he'd like to watch her try and sedate the thing. But he lets the Doctor go on and bend her brain a little more.

"I think that's one of the last impossibilities. Unless you count the fact that this place designates days... where you have to do things. Like sing. Or talk like pirates. Apparently." As though he wouldn't know. "We've been banished to Toon Town. I suspect that's because the dear old Mickey likes the Doctor. And then I got placed there because I probably worried him."