Other mistake: As Roy meets his daughter, he gets out of his car and we see the car door left open as he runs towards her. Near the end of their conversation, the camera focuses on Roy, and through the space between his body and right arm, you can see the side view mirror indicating the door is now shut without anyone touching it. (00:26:50)
Other mistake: Throughout the movie Roy buys Tareyton cigarettes, but if you watch closely he smokes "Kool" cigarettes, easily identified by the gold label.
Answer: He likes to blame non-existant pygmies for bad things that happen.
Myridon