YouTuber Vinesauce has an entire channel dedicated to playing "corruptions" -- game code that is run through emulator software that randomly alters the code, turning colorful characters into twisted deformities from a realm where terrified screams are the native language. The above is from a kids' game called Elmo's Letter Adventure for the Nintendo 64. Here's a clip, and you need to turn up your sound:
Yes, applying the corrupter opens the Pandora's box of misshapen nightmares hidden deep below Sesame Street. Muppets warp and jitter, their speech turns into demon hate language, and your childhood dies a violent death.
"Hi, Grover! What letter does 'dog' start w-"
"EMBRACE THE DARKNESS, MY CHILD."
As the first round of tears begins to exit your face, the Dark Muppets spew poetry of the damned in a sound not unlike Slayer lyrics sung underwater, while Elmo appears to understand every word. All the Muppets your childhood mind remembers from the PBS show are replaced by entities so evil that Death himself rejected them.
Actually, this is precisely how we remember Big Bird.