He catches that frown. Is it that she's never heard of it, or knows it all too well? The concept of alternate universes is hardly lost on him, or the idea that what exists in one world might not in another. Take the very fundamental concept of Batman, for instance. Or Superman. He and Kent have both met enough alternates and doubles to last most normal people a lifetime.

One corner of his mouth lifts at that thought. 'Normal'.

"Do you give lessons?"