Bud Light may have just ushered in a bold, new era of viral marketing. When a Washington Nationals fan took a home run ball to the chest rather than drop the Bud Light beer cans he held in each hand, the Anheuser-Busch beer brand seized the moment and turned it into a unique marketing opportunity in record time.In the sports world, social media thrives on spontaneous occurrences that are captured and shared widely by fans on Twitter and other platforms. Bud Light capitalized on a moment that was tailor-made for the company …