My favorite quote from Watchmen would be:

"You don't understand, I'm not locked in here with you, you're locked up in here with me."

or

"I've just broken this gentleman's little finger. Who killed Edward Blake?"

Good ol' Rorsach.

Now guess this one:

"One hundred years ago...haunting the fogbound, gaslit streets of white whitechapel. Oh, I was jack then....Red Jack, Spring-Heeled Jack, Saucy Jack, Jack from hell, trade-name....Jack the ripper"