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Apparently, Cranfield University in England has prototyped a novel airbag technology to protect pedestrians hit by cars.

From the photograph, it looks to have a somewhat Rube Goldberg flavor to it. To my unpracticed eye, it also looks to be somewhat expensive although a spokesman for the project reassures us that, "it would add little to the cost of the vehicle." Why does this seem unlikely to me?

There is essentially no limit to the features that can be added...