How a huge Windows logo got displayed on the Apple store in Hamburg

Apple is going to open a huge Apple Store in Hamburg sometime this summer/fall. Apple remains very secretive about it. The whole building in the prime location “Jungfernstieg” is hidden behind black panels. On Friday however, all of a sudden a huge Windows logo was displayed, making it look like a Microsoft store.
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Obviously this was a prank. A good one too. Two guys – dressed and behaving like construction man – put the Windows logo up. Check out the video to see the logo in the making.

[vimeo http://www.vimeo.com/24653938 w=500&h=283]

PS: If you look closely you can see that there is a small mistake in the logo. The blue and green are flipped.