Happy is the kitty who notices things. From time to time, the things she notices are only there in her mind.
When she stops and stares at the floor or the wall or the ceiling, I always make sure to look, as she is the number one spotter of creatures in this house.
This time, she was staring at a new light fitting only just installed yesterday. She kept staring for ten minutes or so, just to make sure it did not move.