It's just one of those days where everything's a bit off. Reality is skewed, things don't act like they normally do.
The sky is dull, a surreal kind of dull. It's blue, but it isn't; the clouds belong to another planet.
The people look normal, but don't act the same. They stand there gazing, not touching, not breathing.
It's just one of those days where everything seems a bit alien. Where, if you weren't careful, you could get lost without return.