system
anxious: I couldn't get any sleep last night.  Something was scratching on my window.
human
Man I couldn't get any sleep last night.
human
Were you worried about something? What was keeping you up?
human
There was something scratching on my window.  I was pretty nervous.
human
Hopefully you had a lock on them, you can never be too safe.
human
Well that's the thing.  when I looked out in the morning I didn't see anything.