I was simply scaring sparrows at random and amusing
myself by it. I might foam at the mouth, but bring me a doll
to play with, give me a cup of tea with sugar in it, and
maybe I should be appeased. I might even be genuinely
touched, though probably I should grind my teeth at myself
afterwards and lie awake at night with shame for months
after. That was my way.
Which part of this excerpt most clearly reveals that the narrator has
monstrous qualities?