Because he's not a rat.
The police.
You are under arrest.
The teacher tells you to spit you gum out. The train says, "Chew, chew, chew!"
Everything you say goes in one ear and out the udder!
Because he wanted to hide in the crayon box.
Because he wanted to hide in the colouring box!
In a Parma-John.
A magician makes rabbits appear in hats, while a psychologist makes habits appear in rats.
Two, but you have to get them in the lightbulb first.
When your a mouse!
None. Mice can't change light-bulbs as they are mere rodents without the physical or mental ability to do so. Not to mention it's much safer for them to pilfer food in the dark.
