The count starts again. When it gets to (for example) 5, everybody (for example) with a white shirt will drink. When it gets to 13 again, the name of the game is yelled and the person who said 13 will make another new rule for another number.
Possibly the fastest way to get drunk in a drinking game, aside from Roxanne. It's preferable if you don't pick a rule that's universal to human beings, like "everybody with a heartbeat."
ALL HAIL THE GOVERNOR!
13 Person: On 8, everybody with a sweater on has to drink!