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Dave Lizewski: With no power comes no responsibility.

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Towards the end of the film after Hit Girl strikes one of D'Amico's henchmen with two kitchen knives you can see the position of the knives in the henchman's chest change position between shots. See more...

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Nicholas Cage, who played Big Daddy, purposely delivered his lines in the halting style used by Adam West in the 1960s TV series. See more...

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Movie Mistakes blog

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Kick-Ass (2010) - 14 corrections

starring Aaron Johnson, Chloe Moretz, Christopher Mintz-Plasse, Mark Strong, Nicolas Cage (add more)

Genres: Action, Comedy, Drama

Comments made in brackets are corrections from other visitors. To submit your own corrections for mistakes, just click "edit" under an entry, then choose "correct entry". You can also submit corrections for corrections, if you think a mistake has been unfairly removed.

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In the scene where Kick-Ass and Hit Girl after they flew (with the jet pack) onto a roof and tell each other their real names, you can see that Kick-Ass's baton holder is completely gone from his back. [He's wearing a jet pack, which would not allow for the batons or the holder.]
Edit
When Red Mist shoots Hit Girl, Big Daddy is devastated. Yet, earlier in the movie, he was seen training his daughter to withstand bullet hits. Surely, he would remember this and realize that she's okay. [His daughter just got shot by someone trying to kill her. "Training" or no, that's still going to affect a father. And bear in mind that she also falls backwards out of a window.]
Edit Corrected by Phixius
During the comic book scene at the beginning, when Marty mentions Paris Hilton, he is holding a comic book. In the next shot, the comic is on the table. [He doesn't open it to the same page he was reading when he holds it up.]
Edit Corrected by rswarrior
At the end of the movie, when Kick-Ass and Hitgirl are on the top of a building, Hitgirl takes off her wig to show who she really is, but the wig comes off too easily to stay on during all of her fighting scenes. [Hairpins provide exceptional hold, but will slide right out when you pull on them. General jostling and deliberately pulling on the wig itself are two completely different things.]
Edit Corrected by Phixius
When Todd and Dave are walking out of the comic store, Todd has a chain hanging down from his jeans. When they are walking through to the car park where they get mugged, he has no visible chain or any sign that he has tucked the chain into his jeans. [And what sign would there be that he has tucked the chain onto a pocket? He doesn't seem at all surprised to be getting mugged, just scared and frustrated. It's seems entirely logical that he'd hide the chain to hide the presence of a wallet.]
Edit Corrected by Phixius Time
When the five kids are sitting in the comic store and Katie says something about how she would "bang the **** out of Kick-Ass", we can see out the window that it is raining reasonably heavily outside. We then cut to Katie and Dave making out in the alley behind the store only about thirty seconds later, and it isn't raining. [It's not raining reasonably heavy, it's a light shower, plus it's quite sunny and light out, indicating the rain isn't widespread. Once in the alley, Dave and Katie have damp hair, hinting that a light drizzle is occurring, or has just finished drizzling.]
Edit Corrected by rswarrior
In the scene after Kick Ass meets Hit Girl and Big Daddy for the first time, D'Amico is examining an iPhone with a photo of Big Daddy on it. One of his goons explains that the photo is the last one the owner of the iPhone took before his death, but the screen says that the photo displayed is photo 7 of 16. If it was really the last photo ever taken, it would be 16 of 16, assuming that the goon hadn't played around with it before showing D'Amico. [You just answered your own mistake. "Assuming that the goon hadn't played around with it before showing D'Amico." None of D'Amico's goons have been shown to be overly bright, and it's not unlikely that one or more of them would take more pictures with the camera before showing it to D'Amico.]
Edit Corrected by rswarrior
In the scene where Mindy is being trained by her father to withstand a bullet to the chest, in the shots after he fires the first time, her jacket has no holes in it. [The bullet holes in Mindys coat can be seen in the Blu-Ray release. They aren't easy to see but they are there.]
Edit
The newspaper headline read 'kick-ass impersonator killed' or something resembling that, but the problem is, no one knew who kick-ass actually was. Therefore they wouldn't know for sure if it had been the real kick-ass or not. [They would know, from family or pay stubs or tax records, that the man they identified worked as a Kick-Ass impersonator.]
Edit Corrected by Phixius
The scuba wetsuit Dave ordered online is totally different from the one he received. [True, but mix-ups in online ordering occur all the time. Dave didn't get what he ordered but decided to use the suit he received instead of waiting to return it and get the replacement.]
Edit Corrected by BocaDavie
At the time in the end, where Hit Girl introduces herself to Kick Ass, and takes her mask off, she says I'm Mindy, then there comes a 1 second shot of them away, and you can see she's still wearing the mask, when that 1 second shot finishes the mask isn't on. [I have no idea what you're talking about. Because after she takes the mask off it's still off.]
Edit Corrected by Tonycdrive
When Hit Girl runs out of ammunition as she's about to kill the last gangster in the hallway scene the slide to her pistol is closed, indicating a round is chambered. An empty gun's slide would be held open. [This could very well be an FTF, or "Failure To Fire" and isn't really indicated past her own surprise that the pistol didn't go off.]
Edit
When Kick-Ass called Big Daddy and Hit Girl for help, they leave behind their hot cocoa. After Hit Girl rescues Kick-Ass and they return to their house, Hit Girl looks at the two mugs of hot cocoa and we can see the marshmallows floating in both cups. Considering the amount of time elapsed, those marshmallows should have been melted. [Not so. We don't know how hot the drinks were in the first place, and by virtue of the fact the drinks would be cooling down means the marshmallows never get to melt.]
Edit Corrected by GalahadFairlight
When hit-girl is pinned down late in the film by the few remaining men and is out of ammo, she never uses the grenades strapped to her. Assuming they were any kind of functional grenade, i.e. a flash, smoke, or frag, she could have used them to, at the very least, cause a distraction well before the guy goes to get the bazooka. [There are two reasons to explain that. The first reason is that she simply didn't think of it. The second reason is that she did think about it, but could not see how it would help in that situation.]
Edit Corrected by Knever