Most Of The World Living In Giant Apartments?

Image Source: IMDb

This dream seemed to be inspired by the TV show Snowpiercer.

All that I can remember of this dream is that a lot of the world seemed to be living in one or more large (giant) apartment buildings, I could be wrong though, and most of the dream took place inside a large multi-story apartment building.

Train To Busan (Busanhaeng)

Image Source: Amazon

What is it?

The 2016 South Korean action-horror movie Train To Busan (Busanhaeng).