Courtesy of my Sister-in-law. It turns out this is only a conceptual product. I went to the purported dealer, http://www.conrad.de, but they have no such bike lock. Nevertheless, a wonderful idea, although I’d be worried about some of the liabilities here in North America; would potential accidental falls and the resulting injuries be covered under third-party liability? Europeans seem to have a much more lackadaisical attitude towards these things like, “Vell, you should have been looking upvards as you ver valking!”.