A friend just got back from Italy where he noticed one extremely interesting Vespa. The owner had build a knife sharpening "station" on the back of it. It uses the Vespa engine and he just drives to different spots and sharpens people's knives.
A picture and a short video here: http://www.urbaanurr.com/2008/07/vespa-mootoriga-mobiilne-noaterijata/
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