Is an Angry Customer A Loyal Customer?

Can an angry customer become a loyal customer? Or in fact is an angry customer already a loyal customer? An angry customer is sometimes unavoidable. If they let people know they are upset, and if people take care of them, they can actually become an asset to the business. I know the previous statement sounds like a paradox. But think about it. Statistics show that the typical company hears from only 4% of its dissatisfied customers, 96% of unhappy customers just walk away, and 91% of those never come back.