This one was from when I was in grade 3
The school took us to a field trip and promised us to eat pizza, stated in field trip paper, when we went and as they were distributing the pizzas, I brought a box over to my friends only to find out the pizzas were for grade 4+ and we were gonna have happy meals, the idiot who has been supervising our trip blamed me, but my parents and the school sided with me so nothing happened.