- In one episode, Uncle Phil accidentally sits on top of a shoe box containing an adorable white pet bunny. Him killing it, looking inside the box and reacting in horror, and then telling the little boy who owned the bunny is all played for laughs. It really shouldn't be though. There is also the bit later where Nicky finds out is meant to be charming, but seeing how disturbingly nonchalant he is about his pet dying and even saying "Death is just a natural part of life" is definitely jarring coming from a 6 year old.
- The infamous Halloween Episode "Hex and the Single Guy". When the family visits a soothsayer to contact the spirit of Hillary's dead fiancé Trevor, Will pisses off the psychic and gets himself cursed, which brings bad luck to everyone around him. When Will eventually returns to the shop, it has mysteriously vanished, and the man who was previously the psychic now claims he has no memory of ever meeting Will. Will suddenly wakes up back in his bed, finding that it was All Just a Dream... only for the previous mornings dialogue to play out the exact same way as the first time, even when Will attempts to stop it. Finally, Hillary walks in and says she wants to introduce her new fiancé, Trevor. Cue Will screaming into the camera as the credits start.
- In "Mistaken Identity" as Carlton is driving Mr. Furth's car down to the conference for him and naming off a checklist of things for him to do, Will (who was stowing away in the backseat to go to the conference himself with the intent of going to the beach and chasing after girls) suddenly appears while wearing a Freddy Krueger mask and razor-fingered glove, growls at him "Four: get the stick out your butt!" and scares him to the point of almost crashing the car. Granted, it was all Played for Laughs (and much more lighthearted than the rest of the episode's content), but what would had happened if Carlton not been used to his cousin's antics or was a more excitable person?
- "Bullets Over Bel-Air", easily. Imagine one moment you're innocently running an errand and the next you're looking down the barrel of a gun. Even though both Will and Carlton were full-on woobies in that episode, the latter may be moreso; the former was indeed shot, but he was much more traumatized and guilt-ridden by the event (a given considering his more sheltered upbringing), leading to some heavy Out of Character moments, including telling his own father and hero that the system that he stands and works for is a joke and purchasing a gun with the intent of shooting anyone who made him feel unsafe. It lead to Will having to first beg him for the gun and when that doesn't work, having to invoke You Owe Me, since he had gotten shot protecting Carlton. Worst of all, whoever it was that shot Will was never caught.
- It gets even more chilling as it's hinted to the fact Carlton was going to find the guy who shot Will and shoot him for revenge. Thank god Will made him get rid of the gun.
- "Just Say Yo" has Will overwhelmed by the pressures of school, work and his girlfriend so a classmate offers him some speed, which he accepts but does not take himself. Also, Carlton has an acne breakout and while the two of them are at their prom, he asks Will for some vitamin E to help clear up his face, but going into his bookbag, he accidentally takes a handful of the the former instead. The next scene has him dancing wildly in the middle of the dance floor and after Will realizes what's going on with him, he tries to have his cousin leave with him to go to the hospital, only for him to reply "What for? This is the greatest night of my..." and promptly passes out in front of his horrified classmates. He survived but it could have easily gone the other way.
- As funny as the first season's two-part Halloween Episode was (and it leaned more towards humor than a scary theme like the aforementioned one from season four), there's still something indistinctively unsettling about the closing theme of both the episodes.
- Uncle Phil's heart attack in "Home Is Where The Heart Attack Is". Even though it completely averts the symptoms of a Hollywood Heart Attack, both he and Will were understandably terrified by it all, especially when the poor guy was in the ambulance and at one point kept screaming that he couldn't breathe and Will then freaking out over it (because the latter was accidentally leaning on his oxygen). As bad as it was to see at the time, it became much more difficult to watch twenty years later after James Avery's passing due to complications from heart surgery.
- "Where There's A Will, There's A Way Part 2" Trevor proposes to Hilary by bungee jumping. The whole family even Hilary is excited to see Trevor propose and bungee jump on live TV it all starts out well but as soon as Trevor jumps and propose to Hilary he's cut off in mid sentence as he slams the ground and dies! The scene is silent with static on the screen and what's looks like Trevor's dead body signaling in and out on TV or something. Will says that he's not suppose to be slamming on the ground like that. The TV screen says "Please Stand By" while Hilary believes that's the president is going to say something. Phil assures that Trevor is okay. But in the next screen everyone is dress in black and sad even Hilary while holding the urn hinting that Trevor had died and on LIVE TV where everyone watched it happen!
- Also scary is that Hilary is holding the urn where she thinks that it's Trevor but Will told her that it wasn't Trevor causing Hilary to be disgusted as the butler grabs the urn and walks out.
Nightmare Fuel / The Fresh Prince of Bel-Air