#4 – Potato Chips
A favourite snack for many was actually invented because a customer once complained at a restaurant. To be more specific, a chef in Saratoga Springs, New York, was working at a restaurant that was famous for its French fries. However, one day, a guest complained that the fries he received were too thick. The chef, known as George Crum, made a batch of thinner fries and sent them to the guest who appeared to be unsatisfied once again. Out of spite, Crum cut up potatoes in paper thin slices, and sent them to the guest with the intention to irritate him. The guest actually ended up liking them, and when other people at the restaurant noticed him enjoying his plate of potato chips, everybody expressed a wish to try some.