As Emmett and Brenner look out the windows, they each see that the field and the street are dark, but the moon provides enough light for them to see and realize what is happening. For Emmett, he sees farmers tending the field. For Brenner, he sees carpenters working on a nearby house. However, these workers were not ordinary. Most of them are slack jawed and moved jerkily. Focusing on one reveals rotting skin, even missing limbs for some. 

On Brenner's side, a figure fell off of the second floor of the house being constructed. When it hit the ground, its parts scattered, and a nearby figure walked to clean it up. In this action, the figure becomes illuminated, revealing itself to be an animated skeleton, defying physics, among other branches of sciences. 

As you observe them, they continue on with their work, toiling on the field and on the house.