- Bizarro's sudden and shocking descent into genocide, all to realize his goal of being Superman's truly perfect imperfect duplicate, including killing himself so he can be the opposite of alive. Lois mentions that he couldn't stop laughing the entire time he was on Earth, which means he was either perversely enjoying it, or — in his own peculiar way — crying. He also stammers when telling Superman he destroyed Bizarro World, suggesting that he didn't want to but Myxzptlk forced him, or that he's only beginning to realize what's happened.
- 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 Luthor's 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 charred remains.
- Superman being heartbroken and angry, using his heat vision to brutally attack someone — and according to Saturn Woman, he's prepared to kill. Beware the Superman.
- Mxyzptlk 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 didn't 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.
- 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!
