At the beginning during the soccer game there is a close shot of Homer and Marge where Homer says to Marge "Oh I'd kill myself if Portugal doesn't win" but in this shot which partly shows Bart, he looks a different person with a long sleeve shirt and trousers stead of shorts and short sleeve. See more
You lied to me Homer. You told me you got rid of the gun.
But Marge, I swear, I never thought you'd find out.