History NightmareFuel / TeenageMutantNinjaTurtlesMutantMayhem

* While the ending has an aura of positivity, it's when we cut to the Turtles being spied on by Cynthia that it becomes MoodWhiplash. With the Turtles now being accepted by society, she realizes that capturing them is going to be more difficult than she believed. Then Spider suggests that "there is one option", with Cynthia agreeing to bring them in. And that someone is a familiar, [[TheDreaded feared ninja overlord]]...
-->'''Cynthia:''' "[[WhamLine Bring me]]... '''[[ArchEnemy The Shredder]]'''."

While ''WesternAnimation/TeenageMutantNinjaTurtlesMutantMayhem'' is a fun adventure throughout, don't let your guard down into thinking that there won't be [[Main/NightmareFuel moments like these]].

** He isn't pretty to look at to begin with. His left arm in particular is unnervingly human though his middle two limbs also function as arms and are still buglike. When outlining his evil plot, he puts emphasis on the soft 's' twice by ''[[FurryReminder buzzing]]'' in an intimidating manner.

** His endgame? Releasing the mutagen into Earth's atmosphere, allowing all fauna (excluding humans) to become the dominant species, whereupon they will be the ones subjugating humans instead. He outright suggests having "redhead shows" instead of dog shows as an example.
** His [[BodyHorror absolutely hideous final transformation]] in the movie's climax. He’s crushed under his mutagen launcher and winds up fusing with a whale. Then he slams into a zoo and fuses with every animal present. Or rather, the animals melt into his body becoming his limbs. [[AndIMustScream And the animals are still alive and most likely in complete agony]].
*** During the FinalBattle, [=SuperDuperFly=] manages to see the Turtles and Splinter attempting to hit his AchillesHeel with a canister of Anti-Ooze thanks to a reflective glass building and grabs their pizza truck transport mid-air, tearing the top off and seizing the quartet alone. Though Splinter manages to grab the canister before it falls to the ground, he's backhanded several blocks away by [=SuperDuperFly=], hit hard enough that his leg is visibly twisted and broken, leaving him unable to even properly crawl while the giant {{Kaiju}} beast of their foe turns his attention towards his sons and starts using his claw-like right hand as a lever to crush them, the pressure increasing enough to start visibly ''cracking'' the teen's shells. Were they human, it would have undoubtedly killed them. As it is, Splinter is ForcedToWatch this dangerous and crazed mutant sadistically and ''slowly'' kill his sons in front of him, just like he suffered PTSD from being menaced by an angry mob of humans in the past and nearly losing the Turtles because of that. Were it not for April's broadcast motivating the citizens of New York to [[BadassBystander likewise risk themselves]] to help the heroic mutants, Splinter's worst fears would have come true and there was ''nothing'' he could have done to save them. Worse, that [=SuperDuperFly=] focused on targeting the Turtles alone despite Splinter also opposing him shows [[EvilIsPetty how much joy he's taking]] from paying them back for ruining his mutagen ray plan, underscoring how monstrous his FantasticRacism towards humanity has made him.
* [[GreaterScopeVillain Cynthia]] [[AmbiguouslyHuman Utrom]]. Her very action to seize Stockman's research on the ooze is what kickstarts ''[[GreaterScopeVillain everything]]'', from Baxter's death to Superfly and his gang being forced into isolation to Splinter and the Turtles becoming who they are. She continues to play this role in the present day, with her and TCRI fighting tooth and nail to reverse engineer Baxter's mutagen.
** When she reveals to the Turtles what she wants from them, [[CerebusRetcon it makes a certain]] RunningGag [[CerebusRetcon go from funny to disturbing now that it actually comes to fruition]].

** Making it more terrifying is that [[NothingIsScarier we only see part of his armor. It's not much]], but for anyone who is familiar with past incarnations of the Shredder, it's enough to let us know our four heroes are gonna be in for the fight of their lives.

** His endgame? Releasing the mutagen into Earth's atmosphere, allowing all fauna (excluding humans) to become the dominant species, whereupon they will be the ones subjugating humans instead. He outright suggests having "redhead shows" instead of dog shows.

-->'''Cynthia:''' "What I want, [[PunctuatedForEmphasis is, your, blood]]. ''(starts to get giddy)'' And there is only ''one'' way to get it."
-->'''Mikey (realizes):''' "[[OhCrap Oh no]]!"
-->'''Leo (in disbelief):''' "I can't believe it..."
-->'''Raph:''' "She's gonna-"
-->'''Cynthia:''' "Hook them up to the milking machine!"

** Making it more terrifying is that we only see part of his armor. It's not much, but it's enough to let us know our four heroes are gonna be in for the fight of their lives.

* [[GreaterScopeVillain Cynthia]] [[AmbiguouslyHuman Utrom]]. Her very action to seize Stockman's research on the ooze is what kickstarts ''[[GreaterScopeVillain everything]]'', from Baxter's death to Superfly and his gang being forced into isolation to Splinter and the Turtle's becoming who they are. She continues to play this role in the present day, with her and TCRI fighting tooth and nail to reverse engineer Baxter's mutagen.

* [[GreaterScopeVillain Cynthia]] [[AmbiguouslyHuman Utrom]]. Her very action to seize Stockman's research on the ooze is what kickstarts ''everything'', from Baxter's death to Superfly and his gang being forced into isolation to Splinter and the Turtle's becoming who they are. She continues to play this role in the present day, with her and TCRI. fighting tooth and nail to reverse engineer Baxter's mutagen.

* While the ending has an aura of positivity, it's when we cut to the Turtles being spied on by Cynthia that it becomes MoodWhiplash. With the Turtles now being accepted by society, she realizes that capturing them is going to be more difficult than she believed. Then one of her mooks suggests bringing in someone to assist in the capture, with Cynthia agreeing to bring them in. And that someone is a familiar, [[TheDreaded feared ninja overlord]]...
-->'''Cynthia:''' [[WhamLine Bring me]]... '''[[ArchEnemy The Shredder]]'''.

** He isn't pretty to look at to begin with. His left arm in particular is unnervingly human though his middle two limbs also function as arms and are still buglike. When outlining his evil plot, he puts emphasis on the soft 's' twice by ''buzzing'' in an intimidating manner.

* Utrom's "milking machine" extracts mutagen from the Turtles through their shells (i.e. their ''blood''), which is visibly painful for Mikey and Raph. She also gives them electric shocks when they speak out or even express confusion at their circumstances.
** On top of that, the way they went about milking their blood was done by collecting small droplets of it one brother at a time instead of draining all of them at once or siphoning large amounts. Meaning she ''chose'' to do it like this for practically no other reason than to make them suffer.

-->'''Cynthia:''' [[WhamLine Bring me]], '''[[ArchEnemy The Shredder]]'''.

** His appearance isn't pretty to look at. His left arm in particular is unnervingly human though his middle two limbs also function as arms and are still insects.
** Just the sheer fact that anyone who sees him in person, [[NoOneSeesTheBoss they've written their death sentence]]. Probably the best example is in a GoryDiscretionShot with three thugs who tried to rob a necessary machine component under coercion from Superfly. While it was necessary to get the part from the police blockade that surrounded the getaway vehicle, just the fact that he took the thugs back to the mutant's hideaway and deliberately revealing himself before them highlights how much joy he takes from killing humans under any excuse.
** His endgame? Releasing the mutagen into Earth's atmosphere, allowing all fauna (excluding humans) to become the dominant species, wherefore they will be the ones subjugating humans instead. He outright suggests having "redhead shows" instead of dog shows.

* Utrom's "milking machine" extracts mutagen from the Turtles through their shells, which is visibly painful for Mikey and Raph. She also gives them electric shocks when they speak out, even confusion at their circumstances.

** His endgame? releasing the mutagen into Earth's atmosphere, allowing all fauna (excluding humans) to become the dominant species, wherefore they will be the ones subjugating humans instead. He outright suggests having "redhead shows" instead of dog shows.

-->'''Cynthia:''' "[[WhamLine Bring me]], '''[[ArchEnemy The Shredder]]'''."

--->'''Cynthia:''' "[[WhamLine Bring me]], '''[[ArchEnemy The Shredder]]'''."
** Making it more terrifying is that we only see part of his armor. It's not much, but it's enough to let us know our four heroes are gonna be in for the fight of their lives.

* [[BigBad Superfly]]. Don't get us wrong, he is [[EvilIsHammy a hammy fellow]] (courtesy of Creator/IceCube) and does have some qualms qualifying him as a TragicVillain, but he is no slouch when it comes to being the feared leader of a gang of mutants.

** When April stated that [[NoOneSeesTheBoss anyone seeing him in person spells their end]], ''she really meant it''. Probably the best example is in a GoryDiscretionShot with three thugs who tried to rob a necessary machine component under coercion from Superfly. While it was necessary to get the part from the police blockade that surrounded the getaway vehicle, just the fact that he took the thugs back to the mutant's hideaway and deliberately revealing himself before them highlights how much joy he takes from killing humans under any excuse.

--->'''Cynthia:''' [[WhamLine Bring me]], '''[[ArchEnemy The Shredder]]'''.
** Making it more terrifying is that we only see part of his armor. It's not much, but it's enough to let us know our four heroes are gonna be in for the fight of their lives.
* Superfly’s [[BodyHorror absolutely hideous final transformation.]] He’s crushed under his mutagen launcher and winds up fusing with a whale. Then he slams into a zoo and fuses with every animal in the zoo. Or rather, the animals melt into his body becoming his limbs. And the animals are still alive and most likely in complete agony.
** During the FinalBattle, [=SuperDuperFly=] manages to see the Turtles and Splinter attempting to hit his AchillesHeel with a canister of Anti-Ooze thanks to a reflective glass building and grabs their pizza truck transport mid-air, tearing the top off and seizing the quartet alone. Though Splinter manages to grab the canister before it falls to the ground, he's backhanded several blocks away by [=SuperDuperFly=], hit hard enough that his leg is visibly twisted and broken, leaving him unable to even properly crawl while the giant {{Kaiju}} beast of their foe turns his attention towards his sons and starts using his claw-like right hand as a lever to crush them, the pressure increasing enough to start visibly ''cracking'' the teen's shells. Were they human, it would have undoubtedly killed them. As it is, Splinter is ForcedToWatch this dangerous and crazed mutant sadistically and ''slowly'' kill his sons in front of him, just like he suffered PTSD from being menaced by an angry mob of humans in the past and nearly losing the Turtles because of that. Were it not for April's broadcast motivating the citizens of New York to [[BadassBystander likewise risk themselves]] to help the heroic mutants, Splinter's worst fears would have come true and there was ''nothing'' he could have done to save them. Worse, that [=SuperDuperFly=] focused on targeting the Turtles alone despite Splinter also opposing him shows [[EvilIsPetty how much joy he's taking]] from paying them back for ruining his mutagen ray plan, underscoring how monstrous his FantasticRacism towards humanity has made him.
* Superfly isn't pretty to look at in his base form either: his left arm in particular is unnervingly human though his middle two limbs also function as arms and are still insect. He also kills any human that views him, so he's the last thing they ever see, as demonstrated in a GoryDiscretionShot with three thugs who tried to rob a necessary machine component under coercion from Superfly. While it was necessary to get the part from the police blockade that surrounded the getaway vehicle, Superfly taking the thugs back to the mutant's hideaway and deliberately revealing himself before them highlights how much joy he took from killing humans under any excuse, the same sadistic joy of hurting others coming to the forefront whenever he gets into a fight.
* Superfly's plan involves releasing his mutagen into Earth's atmosphere so that mutated animals become the dominant species, wherefore they will be the ones subjugating humans instead. He outright suggests having "redhead shows" instead of dog shows.
* Splinter's transformation. His hand is shown contorting and his bones are heard cracking. The rest is shown in a ShadowDiscretionShot with him giving an agonized yell for good measure.
* Utrom's "milking machine" extracts mutagen from the Turtles through their shells, which is visibly painful for Mikey and Raph. She also gives them electric shocks through it when they mouth off...or even just express any opinion at all, even confusion at their circumstances.
** On top of that, the way they went about milking their blood was done by collecting small droplets of it one brother at a time instead of draining all of them at once or siphoning large amounts of blood. Meaning she CHOSE to do it like this for practically no other reason than to make them suffer.

* Utrom's "milking machine" extracts mutagen from the Turtles through their shells, which is visibly painful for Mikey and Raph. She also gives them electric shocks through it when they mouth off...or even just express any opinion at all, even confusion at their circumstances.

** During the FinalBattle, [=SuperDuperFly=] manages to see the Turtles and Splinter attempting to hit his AchillesHeel with a canister of Anti-Ooze thanks to a reflective glass building and grabs their pizza truck transport mid-air, tearing the top off and seizing the quartet along. Though Splinter manages to grab the canister before it falls to the ground, he's backhanded several blocks away by [=SuperDuperFly=], hit hard enough that he can barely move afterwards while the giant {{Kaiju}} beast of their foe turns his attention towards his sons and starts using his claw-like right hand as a lever to crush them, the pressure increasing enough to start visibly ''cracking'' the teen's shells. Were they human, it would have undoubtedly killed them. As it is, Splinter is ForcedToWatch this dangerous and crazed mutant sadistically and ''slowly'' kill his sons in front of him, just like he suffered PTSD from being menaced by an angry mob of humans in the past and nearly losing the Turtles because of that. Were it not for April's broadcast motivating the citizens of New York to [[BadassBystander likewise risk themselves]] to help the heroic mutants, Splinter's worst fears would have come true and there was ''nothing'' he could have done to save them. Worse, that [=SuperDuperFly=] focused on targeting the Turtles alone despite Splinter also opposing him shows [[EvilIsPetty how much joy he's taking]] from paying them back for ruining his mutagen ray plan, underscoring how monstrous his FantasticRacism towards humanity has made him.