- In A Modest Destiny, the main character learns how to control his shadow as a joke. It isn't mentioned again until he's facing down the Big Bad, when he uses this power to defeat him.
- The Order of the Stick:
- Roy's grandfather takes the time to teach him the Spellsplinter Strike to disrupt spellcasting while they chill in the afterlife. It later gets used against three different people: an illiusionary Xykon, General Tarquin's wizard Miron, and a vampirized Durkon. It works exceptionally well in all three cases: Xykon's spells are completely neutralized and he is killed (though it turns out to be a Lotus-Eater Machine), Miron has his defensive spells messed up, allowing the Order to wound him so much his contigency spell teleports him home, and Durkula's Destruction and Slay Living spells get messed up, allowing Roy to survive long enough to mess up Durkula's first attempt at achieving his goal.
- Earlier in the series, when Vaarsuvius is polymorphed into a lizard, s/he finds that only three of his/her spells will work in this new form: Hold Portal, Feather Fall, and Suggestion, all of which seem useless. Naturally the party find themselves stumbling over a steep slope, requiring Feather Fall, and then meet a dragon who speaks Lizard and is therefore a valid target for Suggestion. In a subversion, Hold Portal doesn't work when it could have been used because there are no portals around to hold.
- This becomes a bit of a Chekhov's Boomerang later when Vaarsuvius is paralyzed during an attack but has the foresight to have these spells memorized just in case a similar circumstance would occur again.
- We learn during Schlock's origin story that carbosilicate amorphs were evolved from advanced data storage systems. This becomes important in another story arc much later when a piece of Schlock is used to rescue a rogue A.I.
- In Venus Envy, Zoe's Tai Chi comes in useful when Nina comes at her with a knife. Would have worked out great if not for the fact Zoe was holding something herself afterward.
- In El Goonish Shive: Early in the Sister 3 arc, Susan weaves her way through a crowd, demonstrating impressive dodging skills that she picked up because she Hates Being Touched. Later in the same arc, she uses those same dodging skills to take out a drop bear.
- In episode 176 of Roommates, we see Jamie put to use the dramatic rope skills he learned from Erik all the way back in episode 68, over 32 months prior.
- In The Fancy Adventures of Jack Cannon, the one in charge of Jack's Training from Hell was his Knife Nut mother. This finally becomes relevant on page three-hundred and fifty-eight.Jack: FINALLY! DO YOU HAVE. ANY. IDEA. how long I've been waiting for someone to throw a knife at me?
- Roxanne's whittling in Rusty and Co..
- In Too Much Information, we learn Ace's mom is still in the armed forces. We learn she's a language expert. We learn she's picked up a few extra languages recently. After years of set-up, we finally learn what she really does: she is on an SG team for the Stargate program.
- Minmax from Goblins knows 38 ways to kill somebody using only his thumb. It was only mentioned in a single panel in one panel way back on page 8. This becomes really important several years and several hundred pages later, as Psion!Minmax only weakness is a single number, and whatever that number corresponds with. That number has been recently changed to 38.
- In the Free Spirit pilot, Winnie teaches Gene how to bowl with a customized alley, decorated with Death Traps. In the second story, "When The Stranger Calls", Winnie bets her right to live among mortals on Gene winning a game of "agniklorvath", a magical variation of bowling that uses that same alley.
- Janet's background in gymnastics as seen in Contest Jitters will prove useful in her future adventures.
Chekhovs Skill / Webcomics