Is it just me?

Is it just me, or does this happen to other people?
Sometimes I will be reading a book, and the next book I pick up also mentions a minor incident.
For instance, the current book I am reading, and the two previous have all had the narrator commenting on the behaviour of flies. I know, it's odd. But I have found this before, obviously not about flies in the past, but a minor incident recurring in successive books by different authors.