Teacher lied to me so I printed his face all over school

This happened like 7 years ago and I still think about it ,we were going inspector ghouls in English and the teacher tells me something about the ghost that interigates them being the baby of I think it's Sheila,the woman that drinks the disinfectant, and that it's the baby grown up ghost investigating his mum's death , so in my paper I write about that because he told me that then a week later he goes "some people wrote made up things in the exam " reads mine out to the class and asks why I wrote that . I'm like sir you literally told me that was the story ?? ,man gaslights me in front of the whole class like no I never said that .

I didn't really forgive him ,he made the mistake of telling us he'd been on a game show so I printed out a bunch of pictures of him pulling stupid faces from the game show and put them all over the school