When Andrew is confronted by the miners and resigns his position, Owen, to his left, is shown standing, sitting, and then standing again in successive shots.
When Andrew examines Christine's throat, he sits in front of a light that is supposedly reflected into Christine's mouth by his eyepiece. We see this from over Andrew's shoulder, and when the light is directed into her mouth, it is clearly coming from behind Andrew, because the back of his eyepiece is illuminated.