The object is to create a running conversation using lines from movies. Each person contributes one line (naming the film) that adds or responds to the prior line.
For Example if the current line is...
"I'm Batman." (Batman Begins)
You could say...
"Now here come two words for you: Shut the CINECAST! up." (Midnight Run)
The next person builds off that. Another example.
POST 1: "Look at those snappers." (Romancing the Stone)
POST 2: "I'm a piranha." (Finding Nemo)
POST 3: "Wake up blimey fish." (A Fish Called Wanda)
"Are you talkin' to me?" (Taxi Driver)