Its simple. Post a random quote you've encountered (IRL, on the net somewhere, doesn't matter) in your post. It can be any length, though try to not to get to crazy with it. The person after you has to quess where its from. If they guess correctly they can post the next quote (after you've confirmed it to be correct). Only 1 quote at a time please. If you wish to make it more challenging, you can blur/crossout/whatever names of places in the quote. (ie: It's a me, ____!) You are free to offer hints at any point from the first post of your quote to when its correctly guessed.
[edit]: New Rule. If at least a week goes without any correct guesses for your quote, you may reveal the answer and pick a new one until somebody guesses it correctly.
[edit2]: Another New Rule. If your quote is correctly guessed and the person who guessed it fails to post a quote of their own within at least 2 weeks time, you may either post a new quote or opt not to (in which case I will provide a new quote)
I'll start.
"If _____ threatens you with nukes, listen to what he has to say."