This forum game is easy. When posting, all you have to do is quote the person above you plus add a comment. Soon, the quote will be way too long to even fit on the page.
Ex.
Person 1: This is an example.
Person 2: *quotes person 1* "This is an Example"
*adds comment* "This is going to get long really fast!"
Person 3: "This is an Example"
"This is going to get long really fast!"
*Adds comment*