- Award Snub: Bette Davis did not get an Oscar nomination for the role. Neither did Olivia de Havilland for her drastically against type performance.
- Ending Fatigue: Miriam and Drew are revealed to be in cahoots while there's still forty minutes to go, and around the time Charlotte is led to believe she has shot Drew, the film just goes on and on. Then Drew is revealed to be alive, and then the film has to reveal another detail about Jewel Mayhew. That makes about ten minutes of denouement altogether.
- Fanon: That Charlotte is being committed to an asylum at the end. The film never states where she's going when she leaves the house, but the fact that she's not being dragged out suggests that it may not be to an asylum. It's entirely left open.
- Heartwarming Moments:
- For such a campy horror film, the ending is surprisingly moving. Charlotte leaves her house, facing the press and the onlookers with dignity - leaving behind the music box that John gave her all those years ago. She's given a letter that finally confirms to her who was responsible for the murder, giving her some measure of closure. She looks back at the house one last time as she's driven away. It's a Bittersweet Ending but possibly the best one Charlotte could have hoped for.
- Charlotte opening up to Harry Willis. He's the first person in the film to be open and honest with her (apart from Velma that is), and she is able to speak to him cordially. It's an Odd Friendship but you can tell that Charlotte is pleased by it. The fact that Harry doesn't hide that he's there to talk to her about the murder, and Charlotte is able to talk about it in turn helps a lot.
- It Was His Sled: Just about everyone knows that Miriam is the film's antagonist. The fact that she's got an evil smirk on the poster doesn't help.
- Narm: Agnes Moorhead's extremely hammy mannerisms and exaggerrated accent as Velma make her scenes unintentionally hilarious.
- Narm Charm: Bette Davis's performance as Charlotte is as over-the-top as Baby Jane Hudson, but still manages to work. In the scenes where she's hamming it up, she still makes you feel sorry for Charlotte.
- Nightmare Fuel: Miriam is a very low key villain but still manages to be quite terrifying, particularly around the time she murders Velma and makes Charlotte think she killed Drew. It was even more terrifying for audiences who were used to Olivia de Havilland playing wholesome Ingenues in throughout her career.
- Special Effect Failure: When Charlotte shoots a bulldozer, a ricochet from the Hanna-Barbera sound effects library plays.
- The Un-Twist: The fact that Charlotte is not shown committing the murder at the start makes it extremely obvious that she wasn't the killer. But the trope is subverted by not making Miriam the killer; she merely witnessed the murder and blackmailed the true killer, Jewel Mayhew.
- The Woobie: Charlotte's entire life has been one long Trauma Conga Line. The man she fell in love with was forced to break her heart and then was murdered later that night. She spent her whole life alone in her house believing her father had murdered John. Then Miriam and Drew try to make her think she's going mad. On top of that, she's being forced to leave her home so it can be bulldozed.
YMMV / Hush...Hush, Sweet Charlotte