One of my cats, Dreamer, sure spends a long time in the litter box scratching around after doing some real "downloading."
The other day I heard him in the next room rustling around in there a bit longer than usual. When he finished he entered my room and he was wearing a little beret and looking quite pleased. He meowed and pointed in the direction of the litter box.
So when I went in later to clean the box, here is what I found.
At least it is a happy face!