YMMV / Concerned

• Accidental Aesop: Word of God is that the "Frank Tangent" was meant to be Played for Laughs, but a lot of readers commented on how poignant it was.
• Cargo Ship: With the gravity gun.
  Frohman: Whoa! I guess I actually went completely nuts with it. Just hope the next guy to use it doesn't see my lip-prints all over it.
• Crosses the Line Twice: Loads of the humor in this comic is so juvenile/bizarre/offensive that it spins right around and becomes legitimately hilarious again.
• Hilarious in Hindsight: In one set of notes, the author bemoans the Mets' loss to the St. Louis Cardinals but figures that they'll probably get steamrolled by the Detroit Tigers anyway. Not quite...
  • In this strip, in which Frohman accidentally teamkills a CSS player while buying weapons, Chris notes that "I wrote and posed this comic last week, before our Vice President wounded an old man by shooting him in the face. Just a coincidence."
  • The notes for #171, posted in July 2006, call attention to the then-recent announcement of Team Fortress 2 shipping alongside Half-Life 2: Episode Two, after which Chris states "I'm gonna go out on a pessimistic limb and say we're not gonna see Episode 2 until '07." Sure enough, two of the very last blog posts on the comic's original site before Chris moved on to 1fort confirmed delays to summer and then fall of 2007.
  • The first time Frohman enters a CSS server, many players proposed to Valve to bring the chickens back to Italy. In Counter Strike: Global Offensive, the chickens return, and are better than ever (ie appear in more maps and are more dynamic props).
  • One of Dr. Breen's final scenes has him noting that Freeman hopefully thinks that he's "now in the body of a giant slug or something" (referencing the Combine Advisors). In "Epistle 3" (Mark Laidlaw's leaked outline for the never-developed Half-Life 2: Episode 3), Dr. Breen really does have his mind uploaded into a Combine Advisor's body.
• He's Just Hiding: Despite reading the title, many loyal readers were outraged and in denial once poor Frohman finally got offed to the point that Concerned 2, an unofficial sequel, revealed that Frohman was brought Back from the Dead by simply re-loading from the last checkpoint.
• X Meets Y: The comic's Surreal Humor and frequent delving into Metafiction has led to some describing it as "Half-Life 2 meets Rosencrantz and Guildenstern Are Dead as a Black Comedy."