Back when I had an actual elevator in my work: They go up the elevator, they go down the elevator. The end.
Proper pitch:
For the first chapter: A young woman on a date with a coworker, is caught in the middle of the invasion of her home city, and the total ramification of being occupied by a foreign power, when it was once thought the US was invincible.
A sub plot line of how Marine La Pen has planned a covert invasion of the US, occupying economic importation vessels in space, and sending an elite division of the Space Seals to climb down like ninjas for a coup.
Note: This is for the prologue, that sets up the dystopian setting.