When someone wrongs us, we can choose to get vengeance with a meticulous, long-term plan—but sometimes payback is instant. In the heat of the moment, we come up with the most scathing reply that has the power to immediately shut up a bad boss, rude customer, or nasty friend. Revenge might be best served cold, but these piping hot comebacks say otherwise. 1. Schooling the TeacherI’m a fourth-grade teacher, and one day I was up at the board struggling to remember how to spell a particular word—hey, it happens. I was trying to make light of it, telling the kids that sometimes adults need help wit…