Ok, so this is very specific, but I am looking for examples of that trope where you have people trapped someplace and someone (usually the detective or other hero character) lights a small fire (often a cigarette) and holds it against the wall. The smoke gets sucked into the wall and this reveals where the secret door is. I know I've seen this done before, but TV tropes doesn't have an example page and I'm trying to find some examples to show a friend. Thank you!
by oscarbelle