Swedish designers have come up with a cycling "collar" which has an airbag hidden inside. In a collision, the Hovding airbag - made from a polymer bag, helium and sensors - inflates around the cyclist's head to form a helmet, according to an article in the Evening Standard.
All the commentary in the Standard and other publications has focused on how this is the perfect answer to cyclists who choose not to wear a helmet because it spoils their hair.
Readers with a strong stomach can watch a video of the airbag in action:
It is a film of a crash dummy on a bike in a slow-motion car crash, filmed over and over again from seven different angles. Messed up hair is the least of a city cyclist's worries.