In other words, viral marketing gets past walls people place to ignore advertisements and create a form of entertainment while putting a brand or business in the mind of the viewer. This allows companies to control the messages they are sending to the public, leave a positive message about their brand with with the viewers, and have viewers pass on the message to others directly. They then do not have to pay for the ads distribution and get greater interest in its viewing.
This is a video of actual dancers perform in a real train station. T Mobile hired many dancers to dance surrounded by unexpected bystanders. T Mobile caught many of these bystanders using their phones to take pictures, text friends, or call others to document the scene they are witnesses. They closed with the single line...
"LIFE IS FOR SHARING"
T Mobile effectively created an entertaining video while managing to promote their product and brand. Specifically they showed how their products play a crucial and entertaining role in everyday life. They inform viewers to never miss an opportunity to catch a create moment and share it with others.