As mentioned, Online Marketing is my latest passion.
I subscribe to an amazing blog by Seth Godin . That's where I got to read about Motrin - pain relievers.
To target a niche segment, Motrin created a viral ad focussing on mother's that carry their kids.
But............ The ad boomranged, there are a lot of YouTube video's mimicking the ad and generally giving viral fever to people at Motrin.
So they pulled it off. Here is the original ad in case you have problems finding it. Personally I think it was not badly made. Perhaps America is too politically correct.