In the episode "Bloody Mary" in Season 9, Randy has to attend AA meetings because he got a DUI. The guy doing the meeting says that he has to follow the "12 step programme" to overcome his alcohol addiction. The guy says the first step is admitting you have a problem and that you have to complete this step before moving onto the other "12" steps. The programme has 12 steps and he has to complete the first to move onto the other 12 steps. That means there are 13 steps in total not 12. Pretty bad maths.