iVoice's Personal Air Bag Device

By day they sell voice recognition software, but by night iVoice apparently have been hard at work on a "Personal Air Bag Device" for which they've recently filed a patent. No word on whether the air bag itself is voice-controlled,
but they do describe it as self-contained device meant to be worn by pedestrians that can automatically inflate based on a "change in elevation or angle" (which means you'll want to take it off before you decide to get horizontal, if you catch our drift). Their target market: the elderly, anyone who works on a ladder or scaffolding, roller skaters, ice skaters, bicyclists, firefighters, and motorcycle riders (they may have to fight with all the other companies who have already created air bags for motorcyclists over this last one). Making the Personal Air Bag especially gadgety, they also mention an optional alarm with built-in GPS that can wirelessly alert others when you've taken a tumble.