MS UK has been running advert for its putatively un-crashable Enterprise Server Software showing two rectangular buildings, not unlike the WTC twin towers, toppling.
The 'art concept' here seems to be the hands of a clock, but both towers were unfortunately leaning in different planes, giving the impression that they're poised to fall.
We've seen it in use on the ZDNet UK Web site, from which we grabbed the image. The ad however has now been pulled, Microsoft UK assures us. ®