I've had this same experience repeated several times in my life, and it's fundamentally remained the same since the first time it happened in second grade. Our entire class turned in short stories, and mine was about birds, but I'd misspelled bird as 'brid' several times throughout the essay. It actually still looks right to me when I see it spelled that way on paper. Brid. So my teacher was in a foul mood (likely hungover), and she went off at great length about how poor the stories were, but the mood was lightened when she went on her tirade about how someone couldn't even spell 'bird' correctly. I laughed along with the rest of the class thinking it was someone else, then found out I was the butt of the joke when papers were handed back.