A shoe having a shock absorber therein. In one embodiment, the shock absorber includes an inflatable member having a hole placing the interior of the inflatable member in fluid communication with the atmosphere. The shock absorber is restrained by a stabilizing structure against lateral instability....http://www.google.co.uk/patents/US4546555?utm_source=gb-gplus-sharePatent US4546555 - Shoe with shock absorbing and stabiizing means
