Eldritch Abomination: It's suggested that Briggs' willingness to pick up rotting meat without complaint is the result of having witnessed one of these.
Flat "What.": When Bugsy says he created a Woodgator, when Quagmire gives the hint for the sewers' first exit, and when Briggs reveals that one direction in the secret passage beneath the Inn of Sin leads beneath the Mayor's statue. Also, he writes one into a screenshot◊.
Help Help Trapped In Title Factory: When noting that Edd the Head's subtitled dialogue has laughter when he doesn't laugh at all, Wields-Rulebook-Heavily concludes the subtitler had gone insane and makes the following comment:
I soon expect to see messages like "Help me I'm being held in Kent and forced to write inane dialogue."
This is madness, but not Sparta. This is the infinite depths of the black pit that Spartans kick you into if you bring them bad things.
Story Arc: Not intentionally (probably) on the creator's part, but WRH is able to identify each level with an ongoing theme: Level 1 was a game show, Level 2 was pinball, Level 3 was an insufferable college professor (although he initially says it's a sitcom, then a JRPG), Level 4 was a Christmas Special, and Level 5 was a band.
Take That: After ranting about the Cutscene Power to the Max at the end of Chapter 3, and complaining that he doesn't want to have to wait for over 20 minutes to do something relevant:
Yeah, that's right. I just compared MGS4 to Limbo of the Lost.
Well, that's that. We're moving on away from Darkmere, still carrying a crapton of stuff in our pocket. I wonder how much of it will end up having a use? (the Bag of Spilling monster shows up) Oh, not this again.
"--oh FUCK YOU!!! FUCK YOU FOR EVEN THINKING YOU COULD PULL THAT OFF!! Fuck you ya stupid motherfucker you could research your goddamn way through a third grader's book report your untalented shit! (Angry Fist-Shake) And fuck you and your smug douchebag Briggs voice and your mumbling mush-mouth Nilmates voice and that was the only two shitty voices you had you cunt! (Angry Fist-Shake)"
Driven to Suicide: The final posted image is of somebody holding a gun to their own head.
At the end of Part 15, upon reviewing the notepad and seeing the list of locations in Darkmere, and realising that a lot of backtracking is about to ensue, a long silence follows... followed by a declaration of "END OF LP..." and the "Suicide is the best side." Emoticon.
Laughing Mad: The Dark Id is reduced to this at the very end.