While Nickelodeon made some of the most iconic shows of all time, that didn’t stop the cartoon giant from crossing the line from time to time and letting their shows get seriously dark and creepy! Looking back on it, we can’t believe some of the stuff these cartoons got away with, be the moments sad, gross, or downright disturbing. Like Ren and Stimpy, who always pushed boundaries but sometimes took thinks to a whole other level. Like the time they were adopted by a very cruel owner, but took their violent revenge in the end. Or the episode of Avatar where they killed their main character! How about when Sid from Hey Arnold is embarrassed of his parent’s financial situation, or when Tommy from Rugrats finds a dead body at the post office, when Heffer from Rocko’s Modern Life tells Rocko that his adoptive mother and father were actually planning to eat him, when Skeeter from Doug becomes ostracized by his entire school, when a serial killer showed up on Spongebob, or the terrifying nightmares about a giant baby haunt Angelica from Rugrats! There was the time that Ren totally lost it on Stimpy and his annoying cousin, the episode where Spongebob tries to be “normal” and winds up the thing of nightmares, when Heffer died and went to “Heck” for gluttony on Rocko’s Modern Life, or how about the time that Invader Zim tore someone’s eyeballs out of his head and replaced them with mechanical ones!? All these moments and so many more might just ruin your childhood!