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.
Good Bad Bugs: A Witch getting stuck under a tree so Con can have a heart-to-heart with her, zombies standing on the walls of a vertical tunnel, a zombie corpse having high-speed seizures and flopping up a stairwell, zombies climbing up thin air, Con getting carried by a Charger into a pond but not drowning immediately, allowing him to walk around on the bottom while singing "Under the Sea..."
Ho Yay: Con and Jed were this in the Fallen campaign.
Jed's aforementioned Dirty Old Man actions towards Austin could be interpreted as this.
Con: Your fly is down!
Cody: Yeah, probably. Wait, these are bibs, they don't have a fly.
Con: Show me? Show me your crotch! (crouches, stares at Elis' groin)
Memetic Badass: Experts agree that Con could slay Chuck Norris with a single Molotov, though Kilplix would certainly be killed in the resulting firestorm.
Nightmare Fuel: Anytime Kilplix walks into a room where there's a Tank or a Horde with no warning.
Replacement Scrappy: Jonna gets some flak for taking up Con's slot on the team, even though the latter's absence is work-related
Turns out, Con's absence wasn't, and now that he's left the group in a fury, Tate is getting the flak, since he was the newest of Kilplix's friends. And hasn't even played a round of Left 4 Dead with them.
So Bad, It's Good: Con's summation of the nonsensical Fallen campaign: "That was shit, I loved it."