From the opening scene of The Dark Knight, we are well aware that something is definitely off about the Joker. His mannerisms alone are a telltale sign that he is a bit strange. One specific mannerism, the signature quick lip-licking. He did it to keep his mouth moist so he could keep up continuity with the Joker’s voice. It was apparently something he did in real life anyway, but ended up working out for the character as well.

As you well know, the voice could be stuff made of nightmares. I will never forget his laugh being imprinted in my mind. The many times over terrible things were happening that he found sinisterly amusing is a little jarring to the human soul… as well as his “Why so serous?” Did you read that in the Joker voice? I’ll just bet you did.