Oh, don't be ridiculous. Really? After everything that's just happened? I can recover and heal myself in ways that you can't. You're not going anywhere at all at the moment.

[ It doesn't entirely surprise him, though it does speak of her devotion to him, which, again, absolutely terrifies him. She's going to get herself hurt, or worse, traipsing after him with such conviction. It's happened before, not just to Clara, but he actually has lost her twice, and it's shaken him. ]

You ask why - there's a toxic gas being pumped down there, Clara, and I have a respiratory bypass system. Memory loss, sedative, nasty business. I don't want you anywhere near it. You don't have the strength to move right now and you know it.