* The story Foster tells to the family after he crashes their barbecue, that ends with him and his family "all sleeping together in the dark", [[spoiler: which seems to imply that Foster intends to [[PaterFamilicide kill his wife, his daughter, and himself]] once he gets to them.]] The dreamy way he tells the story just makes it worse, as he genuinely seems to feel ''that is the right thing to do''.
* The whole movie becomes this once you get to the end, in part due to ParanoiaFuel. Given that many people find Foster [[JerkassWoobie sympathetic]], it makes one wonder just how easily this could actually happen to them or someone they know.