[It takes him a moment to respond, as he tries and fails to connect those two very different ideas.]

...I must admit, I'm not sure what a bleeding nose and quantum mechanics have in common, although I do have some passing familiarity with both. The former, more than the latter, admittedly.

[He takes a seat next to her, and settles in. Given her seemingly out-of-the-blue question, he suspects he's in for a Story.]

I've read some of the theory, but nothing really more than that.