280 including additional elements such as a safety belt assembly 150 fig1 shows a schematic diagram of one exemplary embodiment of such a restraint system safety belt assembly 150 includes a safety belt housing 152 and a safety belt 151 extending from housing 152 a safety belt retractor mechanism 154 for example a spring loaded mechanism may be coupled to an end portion 153 of the belt in addition a safety belt pretensioner 156 may be coupled to belt retractor mechanism 154 to actuate the retractor mechanism in the event of a collision typical seat belt retractor mechanisms which may be used in conjunction with the safety belt embodiments of the present invention are described in u s pat nos 5 743 480 5 553 803 5 667 161 5 451 008 4 558 832 and 4 597 546 incorporated herein by reference illustrative examples of typical pretensioners which may be used in system 280 are described in u s pat nos 6 505 790 and 6 419 177 incorporated herein by reference safety belt system 150 may be in communication with a crash event sensor 158 for example an inertia sensor or an accelerometer including a known crash sensor algorithm that signals actuation of belt pretensioner 156 via for example activation of a pyrotechnic igniter not shown incorporated into the pretensioner u s pat nos 6 505 790 and 6 419 177 previously incorporated herein by reference provide illustrative examples of pretensioners actuated.