Kim is startled by Ron while drinking soda and spits a huge mouthful of it everywhere. This joke also appeared in the pilot episode Crush, when Josh Mankey, another boy Kim liked, suddenly surprised her in a similar manner.
The joke with the clock breaking down during the Seniors' last hour in high school is a reference to the very first Kim Possible episode produced. When Kim is in detention in Tick, Tick, Tick, the clock goes way too fast and Barkin has to reset it.
At Smarty-Mart, Barkin tells Ron, "The center cannot hold." In Ron's memory, Barkin's words are "The center will not hold."
When Ron was feeding and watering the animals at Smarty-Mart, he was whistling the theme to the Naked Mole Rap.
Kim and Ron kiss twice in this episode. The first time was at Bueno Nacho in this part, and the second time was at the end of the second part when they were flying away in Kim's car.
The running gag where someone interrupts Kim and Ron kissing is finally broken in this episode. They did kiss in the episode Oh No! Yono!, but it was brief due to Hana jumping between them.
In this episode, we finally find out what Mrs. Dr. Possible's name is. Her husband's brother, Slim, calls her by the name "Annie". This also explains where Kim got her middle name.
(After Drakken is drenched in his Pollinator mutagen)
Kim: (about Drakken) He's mutating!
Shego: This is new.
(Drakken emerges from the shadows)
Ron: He's a pansy?
Kim: Um, I'd say marigold.
(Drakken looks at his reflection)
Drakken: What?! I look like a kid playing a flower in a school play! All I want is one clear-cut victory. Is that too much to ask? Is it?!
Shego: You know, I could have stolen something actually dangerous, but no, no. You had to be "creative".
Drakken: This time, I win, Shego. I'm due. It's my turn. One blast and zowie!
Shego: And "zowie" is good?
Drakken: "Zowie" is zowie, Shego. It's better than good. It's bad!
Drakken: With this Super High Pollinator - of my own design, I will create my own army of...
Shego: ...killer plants?
Drakken: Are you guessing, or did you just look at my notes?
(He holds up a doodle of himself and a giant plant)
Kim: Do you realize we're actually leaving a lair intact for once?
Ron: Yeah, I know. I kinda miss the explosion.
(The power goes out just as the final bell for the seniors is about to ring)
Mr. Barkin: Well that was anticlimatic.
(He makes a ringing noise as the seniors file out)
Mr. Barkin: Oh, every year! It's like opening a barrel of rabid monkeys!
(Kim and Ron are at Bueno Nacho)
Ron: Okay, not going to panic. Maybe I'm overreacting. What Mr. Barkin said, then Kim's college offers. Okay, nothing to worry about, right?
Ron: Yeah, right, okay, mum out. Don't want Kim to freak.
(Kim comes to the booth with their food)
Kim: Salad for me. Grande combo for you.
Ron: (Freaking) KP! Why does it have to end?!
(Kim spits soda in Ron's face)
Ron: I guess I sort of freaked.
Kim: (after a second) So, what's the sitch?
Ron: Well, see, I was talking to Mr. Barkin, and he said senior year was the best time of his life, and that the center couldn't hold, and now he can't live in the past!
Kim: Once more, with puncuation.
Ron: Don't you get it? It's all going to end. It's a trick. Graduation. It isn't the start of something. It's the end of everything!
Kim: No it's not Ron. We're just graduating. It's not like we're breaking up.
Ron: Breaking up? Breaking up?! I didn't even think of that!
Kim: Oh, no, no, no. It's all going to be okay.
Ron: Okay?! Kim, we're breaking up and we're graduating!
Kim: No, we're not.
Ron: Wait, so we're not graduating?! I knew I needed to take another P.E class!
Kim: Ron, we're both graduating, but we're not breaking up.
Ron: We're not?
Kim: No. It's just graduation, it's not the end of the world.
Ron: How sure?
Kim: This sure.
(She romantically kisses Ron, who smiles as an effect)
This episode aired on Toon Disney's Most Impossible Kim Possible Marathon on April 12th, 2008.
The final two episodes of season four aired on Disney Channel Australia on February 1st, 2008 as a part of a Kim Possible double episode special.
This episode's premiere was ecliped by a 54-hour megathon on Disney Channel in which every single episode and movie in the series was shown.
When the classroom clock breaks down seconds before school is dismissed, Mr. Barkin imitates the bell's ring. The sound and even the triangular shape of his mouth resemble the two aliens in Sesame Street when they discover their first telephone and try to communicate with (not through) it.
The Second Coming:
Barkin: The centre cannot hold.
This line by Barkin is a direct quote from the W.B. Yeats' poem "The Second Coming."
The magazine featured in this episode is called Humans, which is a reference to the very popular real-life magazine People.
Barkin: Soon the now will be the past, and the future, the new now.
This is a reference to Spaceballs, with the "When will it be then?" gag when they search for themselves in Spaceballs: The Movie.
Resident Evil 2:
Drakken's mutation is a direct pass at the Resident Evil 2 game, with William Birkin's mutation into the Tyrant when dropping the G-virus sample.
When Kim and Ron are making their move on Duff Killigan's headquarters, over the communicator, Wade calls it Killigan's Island. This is a play on the name of the very popular TV series Gilligan's Island.
Payback's the Bitch:
When Kim utters the line "Payback's the sitch" as the last words before episode ends, she is making a reference to the popular phrase "Payback's a bitch".
Duff: Don't go all William Wallace on me!
William Wallace, aka "Braveheart" was a Scottish patriot who led the resistance during the Wars of Scottish Independence.
Sensi appears to Ron similar to how Obi-Wan Kenobi appears to Luke Skywalker in Star Wars.