passage from 'Dreaming Of Amelia' by Jaclyn Moriarty

My head exploded.
I finished sweeping up my head and then, for a laugh, picked out a couple of the bigger pieces, and juggled them. That was funny. You should have seen our dog. He thought it was a game just for him, getting closer, desperate to snatch one of the pieces of my head from the air. And I was shaking my head. I mean literally. I'd put the rest of the head in a martini glass and I was: shake, shake, shake. And-
Ah, just kidding.
My head didn't explode.
What, are you as stupid as my dog?

I think this is a very imaginative piece of writing. It shows what goes through peoples heads and how far they can take things. It also shows how they can make something into a meataphor