Correction I would like to make... 
 Fact: When Wendy Banjo is hit by the truck, she is NOT forced to wear Roy's face... it is actually her boyfriend/husband Adam Banjo's face. This can be seen by the fact that after Otis kills Roy with the shovel, he returns to the wounded Adam to remove his face with his hunting knife, all the while saying "you wanna see bad ass motherfucker!"