" I warn you," the boy went on. "I am a magician of great power. I control many terrifying entities. This being you see before you" - here I rolled my shoulders back and puffed my chest up menacingly - "is but the meanest and least impressive of my slaves." (Here I slumped my shoulders and stuck my stomach out.) "

― Jonathan Stroud , The Golem's Eye (Bartimaeus, #2)