"Anomaly #002"

"They visit me in my sleep. I don't know what they are, or why they keep coming back, but I can never figure out where they are. All I see are their shadows, but when I look out of my window, there's nothing. If I close the window, their shadows project onto the glass but do not enter. When I open the window, they only enter when I'm not looking. I don't really know where to go from here, But they don't seem hostile.. more.. curious."