A window above me was cautiously opened, and Poirot himself looked out. 
Someone slowly opened up a window.
All of the windows remained firmly shut and the house was quiet.
The importance of interface management comes into play while assessing the accountability of problems.
A boy sits at the top of a water slide.
There were no changes made in this situation.
People are in a crowded place.
Wrong, no one says anything.
The man and his cat are wearing hats.