[It wouldn't bother Magnus if he didn't answer, he's used to a certain sense of distrust, being a downworlder. It's just part of his life at this point, he does for others and then they expect more from him.]

It's not a wonderland, but then neither was where Alice found herself. The point is clear.

[This poor boy had never read Through the Looking Glass or spent actual time with the movie. Wonderland was full of tricks, deceit, and dismay. It wasn't a happy place, not in the slightest.]

I've heard the matches can cause some visual and auditory hallucinations. Given the atmosphere, you can see why that would be dangerous.