When JD (Just Dog) skids to a stop he has socks on three of his paws but in the next shot when he is following Reggie off camera he has a sock on all four of his paws.
George tells the military school girl that one of the benefits of being dead is that she can drink as much tequila as she wants and not have a hangover.
In an early episode, while Mason is sober, he says that one the benefits of being sober is not waking up with a hangover every morning. The "rules" aren't very consistent.