- How badass/scary is Dean McMahon? On one occasion, when trying to shut down a zany dorm party orchestrated by Zack, she storms into a room that has an angry guard dog in it. The large dog growls and barks at her, and prepares to pounce. McMahon simply gives it an icy glare and says "Don't. Even. Think about it." The guard dog covers its face and begins whimpering. It's still in this position when she leaves the room.
- The best use
of the "Time Out" was arguably the time Zack used it to dodge a punch. - Adam, the photographer from "Model Students", calling Zack out on him trying to convince Kelly, who won a modeling contest, not to go to Paris for a month. Even better, it's one of the few times in the series that an adult did it who wasn't portrayed as being uptight or goofy:Zack: So I worried. What so wrong with that?Adam: What's wrong with it? You just took away the greatest opportunity of her lifetime because you were afraid of losing her. Man, she's lucky to have a guy like you.
- "From Nurse to Worse" has Zack ditching the idea of going steady with Kelly due to a crush on the new school nurse, Jennifer. After Lisa, Jessie and Slater eventually join up and tell her what he did, she then engages in a successful plan to scare him off. Then Kelly (who Zack earlier told that they should see other people) ends up with a good-looking and smart jock named Melvin Nerdly. Finally after she turns in for the evening, her kid brother Kyle dumps a bucket of water on Zack's head.
- Zack giving Jesse a smackdown over her self-righteousness when she tells him he can't understand the plight of underpaid workers because, "You grew up in a land of freedom and opportunity." Zack coolly reminds her, "And you live next door."
- After Kelly dumps him, Zach tries to get back at her by bringing a date to The Max. Kelly tells him off for his hurtful behavior, but it's the other girl who gets to be an example of this:"I heard every word, you creep. How dare you use me to get back at your ex-girlfriend!" (throws a milkshake on him and storms out).
- Jessie punching out Eric.
- Subtly but in "The Lisa Card", Lisa shows great maturity in deciding to tell her father than she overcharged on his credit card. And when he doesn't react as she'd feared he would, she insists she be punished. They mutually come up with the solution that she'll continue waiting tables at The Max until she's paid off the amount.
- Major Slater supporting his son's decision to honor a wrestling scholarship in "Wrestling With The Future" after being convinced by Zack. Also, Screech getting into multiple prestigious, competitive colleges, including Duke, USC and Caltech.
- In Mystery Weekend, Zack figures out the Murder Mystery case and how Lisa was in on it the whole time revealing that everything that happened from the murder to her disappearance and how it played out earning himself a round of applause from the rest and the actors
- In Teacher Student Week, Zack and Kelly become Principal and Teacher for the week. Slater and the Football team decide to take advantage of that by cutting class for a test but Kelly refuses and gets Zack who had been goofing off and taking advantage of his position to support her and he suspends them from the upcoming Football team. When Slater and them barge into his office, Zack doesn't back down and tells them their first priority in school was to get an education and not play football. This also gets Zack a thumbs up and approval from Mr. Belding.
- Zack also gets two of the Football players to back off when they threaten him by telling them he'll call their moms. The two immediately promise to behave.
