Joker

Do you wanna know how I got this scar? It was at my friend's house, and I asked him if I could have some ice cream. He said Only a Spoonful.
I took out a comically large spoon, with a grimace, letting him know that I was gonna have all of his ice cream
He went into a fit of rage and jumped me. He knocked me down and pushed my head against the floor. He took out a knife, pressed it against the corner of my mouth, and said How about a comically large smile?
The next thing I remember, I woke up at a hospital, looking at the mirror.
Now... I'm always smiling.