When Norm is lying next to Ruth on her bed, there is a change of camera. He moves his hand to the center of his chest in each camera shot.
On the morning when Ruth is taken to have her abortion, no one notices the blood on the bed or her bloody hand print on the door.
When Ruth is going out to party with her host family's daughter, she takes a hit from a bong, but does so incorrectly, not clearing the smoke from the chamber.