- Brainiac takes over Lex Luthor's body, making the whole thing very creepy in the brain upload and then Brainiac talking out of Luthor's mouth.
- Made worse in that he's still conscious.
- After Lana mercy-kills Luthor, Braniac keeps his body going on his own for a little while, but it eventually becomes useless from rigor mortis. Even then, the remains of Brainiac detaches from Luthors skull and drags itself a few feet just by The Power of Hate, before finally falling to pieces and shutting off forever.
- Lightning Lord electrocutes Lana into a charred remain.
- Superman being heartbroken and angry, using his heat vision to brutally attack someone. Beware the Superman.
- Myxzptlk gets torn in half in the finale. Despite him being a nebulous 5-d being at the time, it's still rather unnerving to see his image splitting down the middle. Not to mention his scream.
- Hell, just his appearance overall. We finally get to see his true One-Winged Angel form, a purple-black humanoid giant which bends space around it just by existing. Or even just his appearance at first, still in his traditional "imp" form, except his color scheme is now notably darker.◊ He now has a clearly evil look on his face as well.Lois: He didnt look so funny anymore...
- Mxyzptlk had decided to become evil after having spent the past 2000 years being a trickster. Had Superman not managed to stop him, there would have been an evil Reality Warper loose in the universe.
- Hell, just his appearance overall. We finally get to see his true One-Winged Angel form, a purple-black humanoid giant which bends space around it just by existing. Or even just his appearance at first, still in his traditional "imp" form, except his color scheme is now notably darker.◊ He now has a clearly evil look on his face as well.
- Sure, the bad guy deserved it, but seeing Krypto tearing out Kryptonite Man's throat◊ is really brutal. Not helped by the fact that Krypto dies of Kryptonite radiation.The Kryptonite Man: AAAAEEEEARRGH! STOP IT! GET OFF GET OFF GET OFF! I'm killing you, you stupid animal! Don't you understand? I'M KILLING—YAAAAAAAAAAAAAA!Krypto: SNOPF!
- In real life, Julius Schwartz was discussing the story with Alan Moore, and told Moore that he wasn't sure who would write it. Moore allegedly responded by standing up, grabbing Schwartz by the throat, and threatening to kill him if he wasn't the one who wrote the story. There's a reason Alan Moore is considered a Memetic Badass among comic writers - he can be terrifying.
Moore, his his obituary for Schwartz: He ruined my reputation as a gentle pacifist by claiming that I'd seized him by the throat and sworn to kill him if he didn't let me write his final episodes of Superman, and how, now, am I supposed to contradict a classic Julius Schwartz yarn? So, all right: it's true. I picked him up and shook him like a British nanny, and I hope whenever he is now, he's satisfied by this shamefaced confession.
- Alternatively, he can also seem like a psychopathic madman waiting to snap.
- It should be noted that the story's not actually true, but Alan did admit to it.
Nightmare Fuel / Whatever Happened to the Man of Tomorrow?