INT. HALL - DAY
Some letters fall onto the door mat. A girl picks them up and looks through them. She stops on one letter that's addressed differently.
GIRL
Hey Mum! There's a letter for next door here.
MUM
Don't open it then.
She rifles through the letters more, checks that her Mum isn't coming, and then opens the letter. It's a fancy holographic slab which starts to speak.
LETTER
The deactivation code for the North Korean nukes is KIMRULEZ. I hope you receive this message in time. You're the western world's last hope.
The letter self-destructs.
MUM
What was that then?
GIRL
Erm, nothing.
The four minute warning sounds in the distance.