Word Association thread was a hit, so here's a similar game, but with a twist:
First poster posts a word, for example "Cold". Now the next poster must think of the opposite of this word that pops up in his or her head.
Poster 1: Cold
Poster 2: Hot
Now's the tricky part: Poster number 3 has to think of an opposite of poster 2's word, but it can not be the same as Poster 1's, in this case cold.
Poster 1:Cold
Poster 2:Hot
Poster 3: Freezing.
Let the game commence!