The first.  
The main antagonist of the film is trioxin gas. In my opinion, the incredible find of the creators is its material embodiment into a terrifying corpse which can be seen through the window in the lid of one of the barrels. That makes this threat stronger. But the most interesting thing for me how the characters again and again come across things that do not work as they are used to. And make mistakes after mistakes, each of which leads to a worsening of the situation. So I decided to draw the characters and combined two unrelated scenes: in the refrigerator and in the cemetery.