The rules are simple: Replace one word from the poster above you. Can be related to anything.
However, do not post excessively vulgar words, or swears, just have fun with it. No replying to your own phrase.
Come to think of it, there should be a subforum where you cannot gain post count. This is easily abuse-able without that limit 
Example:
Cyberkilla: Updates are coming soon
Prodigy: Updates are not soon
Godfather: Updates are probably soon
So, I'll start
Your post count rises
My post count rises
My flag pole broke
Dolfy's flag pole broke