As soon as the window is open 
A Blue bottle flies in
It sounds in a serious panic
Darting from room to room
Butting at speed into 
mirrors and windows
Its zig zag flight pattern manic
Then it disappears and goes quiet
On the curtain considering its position
it would seem its entry was not a decision
and proceeds to fly into the pane
again and again
Forgetting the window that's open.