Kafi Effect
A quick dive from being the best to being the worst, often because someone got too full of themselves or got knocked down by something random and dumb.
The president went from being respected to being laughed at for wearing a chicken hat.
The company went from being rich to being broke because they spent all their money on a giant soda.
The kid went from being the best in the class to getting sent to the office for eating a whole pizza.