What type of figurative language is they were folded across the fence like they were expecting me?

The figurative language that is being described in the sentence is foreshadowing. This is being defined as a way of using phrases, hints or words in means of unfolding the story or giving the readers a hind of what would likely happen next.

The mention phrase represents the type of figurative language called the Foreshadowing. This means that that the narrator is slightly hinting at the future events and this sort of narration gives a sense of suspense and curiosity that will grip the reader's attention.