These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Anvilicious: Someone involved in the writing process for Dead Meat was absolutely a vegan. There's a rather gratuitous scene of a man eating a bacon sandwich which squeals every time he takes a bite.
Cynthia Keener: You'd be amazed how much the human constitution can withstand.
Ear Worm: In the beginning of the Season 2 episode "The Song Remains the Same", Allison hears "I Will Survive" by Gloria Gaynorplaying loudly in her head, repeating itself until it subtly guides her to the iPod of a missing college student who was listening to the song before her abduction.
Harsher in Hindsight: The episode guest starring David Carradine where he played a spirit that looked like David Carradine (who apparently is also an actor in this universe). It obviously couldn't be Carradine's ghost since, as Allison states more than once, David Carradine was still alive. Three years after the episode aired, David Carradine died during an auto-erotic asphyxiation accident.
Narm: Quite a bit in the later years. Even in the series finale, where Allison dies abruptly of old age while eating pea soup.
In "The Devil Inside", a man claiming to be doing God's work by screwing up Allison's visions, uses an extreme version of this (to be redundant) as a last resort to stop her from foiling his plans.
In the episode Will The Real Fred Rovick Please Stand Up? the end moment when Mallory Kessinger changes from the ultra-hot Ellen Hollman to a man in a bikini. Possibly Nightmare Fuel Station Attendant material, for those who think it's that way.