So this is something I'm always interested in. I love background references/gags in pretty much anything, even our own podcast. There have been a ton of times when all of us will be laughing or talking, but if you listen closely you can hear someone muttering a joke in the background. I listen to episodes repeatedly as I work, but even I miss these gags a lot of the time.
For example, I just now realized there's at least one in the latest episode (the Sherlock one). Lemon reads off Moriarty's titles for the different types of insane Sherlock fic. He says there are "Asexuals," "Dog Cocks and Mpreg," "Asexual Dog Cocks," and then "Miscellany." In the background you can hear Isfahan saying "okay, thanks Taygon," in reference to the Cytran types found on Malatora.
One that I always thought was silly was during the Bad Dragon episode. When we read about the madman who shoved a glass ball up his butt, the post's author says his ass will close up and trap the ball forever. As we're all laughing and vomiting, Kumquatxop enthusiastically exclaims "I remember that level in Majora's Mask!"
I'm sure I've missed a lot of these jokes, and I love tiny details like this. Has anyone spotted any more?