[she looks at harry, trying to follow his train of thought.]

Oh, right. The mirror, wasn't it? I've never seen anything like it in other circuses with similar fun house ideas.

[now, she turns her attention to pyre.]

I know your trick is a secret that you can't reveal — where's the magic if we knew, right? But I think our curiosity would be sated if we got a hint about the mirrors. Please?