For days Yuichiro Katsumoto performed shadow fights with his mystical sword AMAGATANA outside my shop in Second City. The Sound of clashing swords became part of the permanent sound track of the real virtual environment in MarienstraÃŸe. On the last day a new kid on the block finally challenged him: Blumenberg, one of the Second City Residents had turned his iBook in an adequate weapon by poking around with it’s acceleration sensor. A good example how everyday technology can be used in virtual warfare. Aram Bartholl filmed and first blogged it. Read his blog in the coming days for more footage and reports on Second City.