The world's biggest waterslide? Or Microsoft viral?

Stirring up debate across the internet at the moment is this video, apparently showing an Austrian engineer called Bruno Kammerl performing a death-defying waterslide jump across a field and into a child's paddling pool. The video links to www.megawoosh.com, which details Kammerl's extensive preparation for the stunt.

Despite all logic indicating that this is quite obviously fake, it has been so well executed with the accompanying website that people across the web are genuinely falling for it. Brilliant. More convincing perhaps are the rumours that this is in fact a viral for Microsoft project management tools. What do you think?