I got a new camera yesterday:
Sizing up
Attack
That showed you!
Contrition
Meow.
A wild guess..
Were you playing the whistle when picture nr 2 was taken? 
No, my whistle playing is more likely to result in him running away at high speed. He doesn’t mind my guitar playing though.
There are no real mice to hunt in my flat. So he makes do with toy mice, foam balls and my feet moving under the duvet.
Oh Gizmo loves plastic bags. The only thing he likes to attack more are pens. As soon as I put a pen on the table it’s knocked onto the floor and smashed across the room. All my pens are now MIA, shut in a drawer or safely in my pocket.