20 Things You Didn't Know About It's Always Sunny In Philadelphia
2. The RCG Production Logo Contains An Easter Egg
Anyone who's seen enough episodes of the show will surely remember the "RCG" production tag included at the end of every episode's credits. This is the production company formed by the three leads, taking an initial from each of their names - Rob, Charlie, and Glenn.
The tag also includes a garbled audio message which, when reversed, becomes an Easter egg for fans.
In season one this message is Glenn Howerton telling you, "You're stupid for playing this forward," while others have become more surreal and peculiar, such as, "Is it brown? Is it brown? Good work. Is it brown? Is it brown? Is it brown? Good work."