I was trying to provoke the cat into making her world-famous sneer face. One side of the lip goes up like a growling dog and the rest stays relaxed. It's her most effective move against me getting her in trouble because it makes me laugh hysterically every time I see it.
In the last picture you can see she was close to doing it, but alas, it never happens when the camera is out.
Obviously this was taken on my day off.