There is a scene where a character is speeding along a road and sees something that causes him to brake hard. He swerves and skids to a halt. You can see the skid marks on the road from previous takes.
When one of the characters falls into the hole (after running through the woods), the "earth" behind her is moving at one point when she backs into it, showing it to be a sheet of material rather than dirt.
After the girl throws her boyfriend's high school ring necklace into the lake after breaking up with her, he starts driving away and you see the necklace around the girl's neck, then it disappears again.
Eli: Have you ever wondered what it would be like to live in another time or place? Like, to exist in a completely foreign reality where societal conventions don't apply?