When "Subject Two" first arrives at Doc's cabin, there is just a bit of snow on his shoulders. When he starts to talk to the doctor in the cabin, there is a lot of snow on his right shoulder. After the second time the camera switches back to the doctor, the snow is completely gone.
While lying on the table on the front porch, corpse is seen breathing.
When Kate gets in the truck after dropping Adam off, the door is heard slamming first, and then there is a noticeable delay before it is seen to close.