They also specifically asked not to have a TV script. Come the pitch, the agency brought in their chief strategist who acted out the viral script. Dean's reaction? "Scared shitless. We've got to do it." The campaign went on to create huge amounts of attention with the delight of people sharing it being one thing and the outrage of some adding to the high profile of the video.
Viral campaigns do not just occur incidentally. The most memorable ones are the ones that tend to touch the feelings that people already have, such as community pride, excitement, curiosity, or the excitement of winning something that no one is expecting to win. The street culture and casinos are two worlds that are more aware of this than others.