you and Cartman were the bestest of friends among Kyle, Stan and Kenny, you were a very quiet kid, which he liked cause you hardly ever annoyed him, he cared deeply about you so when he started hearing around that transfer students were picking on you, he was furious, he held back his anger for when he witnesses it himself

It was a Friday at school during lunch when the kids came over, they picked on you for being quiet and dumped water on your head, at that moment Cartman snapped