Other items on the No-No List include: no parkour, no letting birds in, no puppets, no using jerky as toothbrush, no peanut butter on binoculars, no talking about your dumb car, no action movie reenactments, and no comparing yourself to Idris Elba - favourable or not.
One of the items that Boyle writes on Jake's 'No-No List' is 'no kwazy cupcakes'; an app that Gina and Captain played in the episode Tactical Village (2014).
Some more items on the 'No-No' list include: no backstory for Ms Peacock, no reciting raps, no sweating, no syrup shots, no talking about Derek, no basketball pregnancies, no baths, and no doing voices of suspects.
The hippo with heads on both ends (modeled on Hitchcock and Scully) in Terry's book is a reference to CatDog (1998). Amy's question about how they defecate reflects long-running internet jokes that have proliferated since the show aired.
One of the no-no's Boyle writes is no "letting it mellow." This is from an adage that is usually heard during times of drought regarding how to conserve water with the toilet. -If it's yellow, let it mellow If it's brown, flush it down