Michael Martone, "Limited"

A passenger on a train watches a boy throw a rock through a window.

(from Double Wide)

I saw the rock, saw the boy who threw it. I saw it hit the window next to the seat in front of me. Saw the window shatter instantly. Saw that now I couldn't see through the window anymore.

Had to read this one quickly and kind of on the sly. I remember it was short and repetitive and kind of puzzling in the manner of Nude Descending Staircase. Ooh, you can read it here. It'll take like two minutes.