the mother of invention

Happiness is winning enough at pub trivia to pay for your drinks and your dinner.

This is even happier when you realize that you haven't got your wallet on you, anyway.

And the height of happiness is the relief that you feel when, having paid your way at dinner with the winnings from trivia, you find your wallet, which you feared missing or stolen, waiting for you on the seat of your car.

(Of course, if you weren't a bleeding idiot, none of that wallet-related anxiety wouldn't have been necesary, but then you wouldn't have had quite the adrenaline rush, would you?)