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Microsoft, an unlikely challenger in the viral video area, has managed to upstage MSI with MEGAWOOSH. Visible Measures, which tracks the top video ad campaigns on a weekly basis, is reporting that the water slide feat-like-no other is making waves and topping their chart with over 2.2 million views this week.
The video which seems entirely unrelated to the Microsoft brand is actually part of a larger German Megawoosh campaign for Microsoft Office Project 2007 (somehow mind-blowing leaps like this correlate with Project, go figure). The video itself is pretty remarkable, and Visible Measures says its viral success is related to people questioning whether or not the stunt is legit.