Basicaly you give your interpritation of what the above avatar has to say to you. Try to make it funny. (And no, if the above avatar has words, you don't just type the words again. That gets annoying after a while...)
For example-
Player 1- *has avatar of kitty*
Player 2- Meow mix meow mix... *Has avatar of Darkrai*
Player 1/3- I is the awsomeness.
And so on!
Start with me, please. People with no avatar will be marked as invisable.