History YMMV / Piranha3D

* FanonDiscontinuity: The last 10 minutes or so (or at least the last minute) are tempting to disregard, given how well-liked characters [[spoiler: Danni and Novak]] die in the final act, and how the [[spoiler: adult piranha]] fall under SequelNonEntity.

* NoEnding: The film ends on the Forester family, Kelly, and Novak [[spoiler: having wiped out a large chunk of the piranhas, but Julie points out that it wasn't all of them. Then, after Dr. Goodman informs them that they were just babies, Novak then gets eaten by a larger piranha, about the size of a bass. Cue credits, without showing what happened to the rest of the school/pack or whether the adults got to everyone on the boat.]]

* FridgeBrilliance: Why do the piranha continue swarming Fallon -- far more than their other victims during the lake attack, where it's an all-you-can-eat buffet -- even though the rest of the piranha's kind why go near him clearly suffer what's effectively an InstantDeathRadius? The propeller is producing an excessively large amount of blood in the water around Fallon by the second due to the dead piranha, which is likely attracting even more piranha in a vicious cycle. Whilst the piranha work well together in swarms, Goodman ''did'' theorize earlier in the film that they probably committed cannibalism to survive underground, so it's not much of a surprise that they wouldn't distinguish dead brethren's remains from fresh ''human'' meat.

* FridgeBrilliance: Why do the piranha continue swarming Fallon -- far more than their other victims during the lake attack, where it's an all-you-can-eat buffet -- even though the rest of the piranha's kind why go near him clearly suffer what's effectively an InstantDeathRadius? The propeller is producing an excessively large amount of blood in the water around Fallon by the second due to the dead piranha, which is likely attracting more piranha by the second in a vicious cycle. Whilst the piranha work well together in swarms, Goodman ''did'' theorize earlier in the film that they probably committed cannibalism to survive underground.

* HamAndCheese:

** The nude ballet scene. The French aria, accompanied by the Flower Duet, just adds to the [[strike: weirdness]] awesome.

** The nude ballet scene. The French aria just adds to the [[strike: weirdness]] awesome.

* OutrunTheFireball: Played with. During the climax, Jake jury rigs a flare with a walkie talkie, [[spoiler:so it will float up and ignite the propane tanks on the boat while he and Kelly get pulled to safety by the line attached to the speedboat his mom is on, and it works. However, the piranhas don't get killed by the fireball, like most movies would have. Realistically, they manage to outswim it and it is the ''huge'' pressure wave the explosion causes that actually kills most of them. Jake and Kelly get out okay.]]

** In just two short scenes, Christopher Lloyd manages to upstage everybody else in the film.
** Kelly Brooks's character, Danni, is pretty much the fan favorite of the film.
** Ving Rhames' Deputy Fallon, especially in his badass final scene.

* EndingAversion: Easy to feel this, given how well-liked characters [[spoiler: Danni and Novak]] die in the final act, and how the [[spoiler: adult piranha]] fall under SequelNonEntity.

* SugarWiki/VisualEffectsOfAwesome: Despite the above, the piranhas in the movie are completely CGI, and yet they really look believable.

* HamAndCheese: Creator/JerryOConnell as the porn producer.
** Christopher Lloyd isn't immune from this either, although his character feels more believable by comparison.

* EndingAversion: Easy to feel this, given how well-likedcharacter [[spoiler: Danni and Novak]]. die in the final act, and how the [[spoiler: adult piranha]]. fall under SequelNonEntity.

** In just two short scenes Christopher Lloyd manages to upstage everybody else in the film.

* NoEnding: The film ends on the Forester family, Kelly and Novak [[spoiler: having wiped out a large chunk of the Piranha, but Julie points out that it wasn't all of them, then Dr. Goodman informs them that they were just babies, Novak then gets eaten by a larger, about the size of a Bass, Piranha, smash to credits, no showing what happened to the rest of the school/pack or whether the adults got to everyone on the boat, nothing.]]
* OutrunTheFireball: Played with. During the climax, Jake jury rigs a flare with a walkie talkie, [[spoiler:so it will float up and ignite the propane tanks on the boat while he and his love interest get pulled to safety by the line attached to the speedboat his mom is on, and it works, however the Piranha don't get killed by the fireball, like most movies would have, realistically they manage to outswim it and it is the ''huge'' pressure wave the explosion causes that actually kills most of them. Jak and his love interest get out of it okay.]]
* SignatureScene: The underwater nude ballet, with the Spring Break massacre not far behind.

* SpecialEffectsFailure: The gore in the 3D remake. Almost inverted; a lot of the time it comes across as ''too'' realistic, [[NightmareFuel which makes it more disturbing than]] BloodyHilarious.

* SugarWiki/VisualEffectsOfAwesome: Despite the above, the piranha in the movie are completely CGI, and yet they really look believable.
* TheyWastedAPerfectlyGoodCharacter: [[spoiler:Danni. Her fate doesn't add anything to the narrative besides some minor suspense and her character feels like she could have done a bit more in the climax meeting Novak and Julie.]]

* EndingAversion: Easy to feel this, given how well-likedcharacter [[spoiler: Danni and Novak]]. die in the final act, and how the [[spoiler: adult piranha]]. are SequelNonEntities.

* [[OutrunTheFireball Outswim the Fireball]]: played with, semi-realistically, During the climax, Jake jury rigs a flare with a walkie talkie, [[spoiler: so it will float up and ignite the propane tanks on the boat while he and his love interest get pulled to safety by the line attached to the speedboat his mom is on, and it works, however the Piranha don't get killed by the fireball, like most movies would have, realistically they manage to outswim it and it is the ''huge'' pressure wave the explosion causes that actually kills most of them. Jak and his love interest get out of it okay.]]

* [[OutrunTheFireball Outswim the Fireball]]: played with, semi-realistically, During the climax, Jake jury rigs a flare with a walkie talkie, [[spoiler: so it will float up and ignite the propane tanks on the boat while he and his love iinteres get pulled to safety by the line attatched to the speedboat his mom is on, and it works, however the Piranha don't get killed by the fireball, llike most movies would have, realistically they manage to outswim it and it is the ''huge'' pressure wave the explosion causes that actually kills most of them. Jak and his love interest get out of it okay.]]

* NoEnding: The film ends on the Forester family, Kelly and Novak [[spoiler: having wiped out a large chunk of the Piranha, but Julie points out that it wasn't all of them, then Dr. Goodman informs them that they were just babies, Novak then gets eaten by a larger, about the size of a Bass, Piranha, smash to credits, no showing what happened to the rest of the school/pack or wether the adults got to everyone on the boat, nothing]]

* VisualEffectsOfAwesome: Despite the above, the piranha in the movie are completely CGI, and yet they really look believable.