I thought about it at work today, and this short scene coalesced in my head:
SLAPPY is asleep. But she is wakened suddenly by a loud noise somewhat like a jackhammer.
Oh, for the love of Charlie Sheen...
She rises and moves to her window high in her tree house, opening it. She yells below.
Hey! Keep it down, will ya! Who do you think you are--
She stops herself as she notices the noise was not from a jackhammer and a construction worker, but some small device operated by BRAIN. Near Brain stands PINKY.
Sheesh, the labor union must be downsizing.
From the mice's level now. Brain looks up to Slappy's window.
Actually, we are genetically engineered lab mice involved in an intricate plan to take over the world.
Yeah? Well, I'm a chronologically engineered squirrel involved in a very simple plan of TRYING TO GET SOME SLEEP!
She pulls her head back into her house. Brain, unfazed, prepares to continue working with his noisy gadget. Pinky remains looking up toward Slappy's window.
Egad, Brain! I think that was Slappy Squirrel!
Brain re-activates the device, not really caring for the answer.
Oh, I LOVE her cartoons! Zort!
As Brain speaks, Pinky's face, still looking up, becomes alarmed. On "you", he moves hurriedly O/S.
Pinky, how many times do I have to tell you: Cartoons aren't real!
Brain is oblivious both to Pinky's disappearance and to the growing shadow on his head. BLAM! The screen is filled with dust. As it clears, Pinky's head peeks into shot, and we see bits of Brain's gadget as well as bits of wood, wire and piano keys, all surrounding a beaten and battered Brain. He raises his head weakly.
Pianos! PIANOS are real...