- Heartwarming in Hindsight:
- Crossed with Hilarious in Hindsight, but the 2015 Supreme Court ruling that legalized gay marriage in the United States made this episode feel a lot more relevant nearly ten years after it aired.
- Also crossed with Hilarious in Hindsight is Cartman's soft side for Heidi when he wanted Mrs. Garrison to give her an A after he broke their egg. Cut all the way to Season 20, and Heidi and Cartman develop feelings for each other after the two quit Twitter and their Odd Friendship eventually evolves into a relationship.
- Moral Event Horizon: Mrs. Garrison crosses it when she makes the decision to hire a hitman to sabotage Stan and Kyle's egg project so that gay marriage would be banned in South Park, therefore preventing Mr. Slave from marrying Big Gay Al. Mrs. Garrison, after she paired up Stan and Kyle together as partners for the egg project, proceeded to humiliate them both in class by calling them the two daddies repeatedly to them. Then Mrs. Garrison has the hitman try to shoot Stan and Kyle's egg to make them fail their project. When this fails, Mrs. Garrison has the hitman try to prevent Stan and Kyle from reaching the town hall with their egg by shooting directly at them, which results in a lot of innocent people getting killed.
YMMV / South Park S 9 E 10 Follow That Egg