The characters of Tokka and Rahzar from Teenage Mutant Ninja Turtles II: The Secret Of The Ooze fall under this. Remember the fights they had with the heroes? Remember how they are essentially defeated by being tricked/force-fed into eating anti-mutagen changing them back to normal? Well, now take those battles into consideration when you remember that they're babies.
It's even worse when you remember that Shredder pretty much sent them out on a destructive rampage by tricking them into thinking that's what "playing" means. In other words, Shredder pretty much brainwashed two innocent children (albeit said children are a mutated wolf and snapping turtle) into endangering themselves and others for "fun".
They're not actually babies, Professor Perry sabotaged the mutagen that created them to make them less intelligent (and therefore less of a threat) and the final shot of them returned to normal shows that both Tokka and Rahzar were full grown.
Which provides another type of Fridge Horror as there is now a full-grown WOLF in the middle of a crowded nightclub of people!!
