Just about like your image of the elevator stuck 18 inches below the floor. Only the building and the (improperly designed/built ??) piles under it have sunk.
The building is twisting and titling slightly - this is most likely the cause of the windows getting jammed and stuck in their frames higher up. No significant earthquakes (yet!) near SFO since it was built, so any quake will only make things worse.
Sunkencity is pinged - jest because.
Thanks Robert A Cook PE. They should have built it with a Wonkavator instead. :^)