One person starts a quote, and the next person finishes it, then starts another one. EX:

Poster one: "Do or do not-"

Poster two: "There is no try."

"Who can take the sunrise? Sprinkle it with dew? Add in some chocolate and a miracle or two?"

Poster three: "The candy man? Yes the candy man! THe candy man can 'cause he makes chocolate and makes the world taste good. And the world tastes good, 'cause the candyman thinks it should!"

"Obi-wan never told you about your father!"
"He told me enough, he told me you killed him!"
"No, Luke-"

Poster four: "I am your father!"

Etc., and so on and so forth. I'll start:

"That's-a spicy-" (Yes, I know this one's short.)