It’s dusk. The clouds have cleared away from overhead, settling on the horizon. A jet appears in the upper left corner of the window moving across the sky in the direction of the lower right area of the window – toward the northwest. It leaves a vapor trail behind it, a chalk line across a perfectly clean blackboard.
It disappears into the distance. First the plane is gone, but that end of the vapor trail is still being drawn. Then it’s far enough away that the end of the vapor trail is no longer visible.
I follow the vapor trail back to the corner of the window where it first appeared. It’s starting to fade. Beginning at my end, it’s dissipating, eventually fading to nothing right at the point in the sky where the plane disappeared a few minutes before. It takes the same amount of time for the vapor trail to fade away that it took the plane to travel from one end of the sky to the other.
All the streetlights have come on except the ones on this block.