[He doesn't know what she's talking about until she continues on, and he does sober fairly quickly when he understands what she's asking. In as far as he can tell, he wouldn't even be able to. Choose not to regenerate when Rose is gone? Sure. Apparently he had already in that one parallel world. (Because really, he doesn't know how he wouldn't have been able to get out of there.) Not grasp any possible chance at spending time with Rose? Impossible. At least to him now.] I won't. [Quietly.] We have a... It's different. I wouldn't do that to you; hurt you like that.

[It softens it a bit but the mood definitely just switched again. He attempts to follow her back to the levity.] All pink and yellow and peachy-fuzz with oddly firm mattresses. Very Rose of you.