[There's an odd twist to his lips, some mix of realization and amusement and exasperation.]

I thought I might have seen a movie like that once...

[Maybe he wasn't imagining that after all. Huh.]

That doesn't necessarily disprove my point, though. Someone could have had an encounter with something they didn't understand and used it as inspiration. I mean, humans thought vampires were just stories until the 1960s.