Even a series as comedic as Sonic Boom has scary moments.
The TV show
- Despite the show being a comedy, there was a moment of horror when Sonic, under the influence of his mecha suit, nearly murders Eggman. Luckily, his friends were able to pull him to his senses before he did it.
- Sonic in general acts creepy as hell when under the suit's influence, and his glowing red eyes only add to the effect.
- There's also the scene in "I Can Sea Sonic's Fear From Here" where Sonic, who is already terrified as it is (being underwater, since water is his worst fear), gets his air hose cut by one of Eggman's robots, leaving him to nearly suffocate to death. Fortunately, his friends get to him in time, but not before he spends an entire minute of the episode frantically gasping for air. It's no wonder that he's even more terrified of water by the end of the episode...
- The Bike Chain Bandit, an Ax-Crazy Hostile Hitchhiker from the episode, "Planes, Trains, and Dude-Mobiles". Knuckles, thinking that Sonic and Tails need company on their way to the Dude-itude concert they're going to perfom at, somehow thinks that picking up the Bike Chain Bandit on a dark and stormy night is a good idea. The Bike Chain Bandit is described by a radio broadcast as a large, snaggle-toothed opossum wearing a trenchcoat, and carrying a duffle bag filled with bicycle chains. The Bike Chain Bandit attempts to choke Knuckles with a bicycle chain while Knuckles is still driving the Dude-Mobile, but fortunately for Knuckles, is kicked out of the Dude-Mobile by Sonic.
- Tails as a Beebot Cyborg in "You and I Bee-come One", as he eventually goes against his allies and connects to other Bee-bots, is quite nightmarish.
- Even worse when Tails can feel the pain of other Beebots getting destroyed, thanks to the Beebot's Hive Mind nature.
- Beth the Shrew nearly getting crushed by a garbage compactor in "Don't Make Me Angry". Grade-A Parental Fear fuel.
- Grade-A+ Parental Fear Fuel: "Three Men and My Baby!" sees Sonic, Tails, and Knuckles looking after Lady Walrus' baby, Chumley. Tails points out the baby can't eat solid foods, Sonic says, "Well, then, put it in the blender" ("it" being the chili dog). Knuckles takes this to mean the baby, and almost puts him in before Sonic stops him.
- Despite mostly being a comedic Straw Fan, Mark in "The Biggest Fan" is incredibly unsettling, even before he kidnaps Sonic and traps him in his house.