Variation to "Like you would really do it."

Is there a trope similar to Like You Would Really Do It where, instead of the show/book/movie building tension over a death the audience knows would never really happen, like a child or main character, they build tension over an event that we know can't be real?

For example, tons of "straight" detective shows, meaning ones that while fictional are purely realistic, occasionally have episodes that deal with magic rituals, pretend monsters like vampire wannabes, theories about time travel, or suspected alien abduction. We the audience know that as there is "Always a Logical Explanation" (not a real trope name, but one I think would fit), the suspense the steadily less and less skeptical characters go through is going to ultimately be resolved by some neat if far-fetched logical explanation to solve it all, lest the entire show's mood and genre alter.

Contrast to another trope that I can't find either, where a show that is completely realistic in all regards randomly has a ghost appear or some other fantastic event that is never explained, goes completely unremarked upon and is never referenced again.

You want Lost And Found, as is stated in the very first pinned thread atop this forum.