I stuck with the movie, slow moving as it was, wanting to see what the load actually is. Others say "nothing" happens. When the driver is told at the end of his trip first trip to go inside the building, which he does and in the dark walks to the windows, where he observes other men have opened the truck and are hauling what look to be dead bodies into a big hole while dirt is being thrown into the hole. Then the lies down to go to sleep and wakened and given his money and directions for the next haul. He is told to be sure and wash the truck. He leaves then stops his truck and takes a hose, opens the back, unlocked now, and is overcome by the smell.