“With grades like this you’ll never achieve anything in your life. You’ll end up a loser”
Fast forward 20 years later. Retired teacher is deadly ill, only a very risky and expensive surgery can save him.
It happens that the best surgeon in the country knows the old man and aggrees to save him for free.
After surgery, when teacher wakes up, the grown-up straight-F student comes into the recovery room.
He unplugs the life support and plugs in his vacuum cleaner.