Inflatable bicycle helmet sent me head over heels

The Hivding airbag is the latest piece of hi-tech hardware offering vital head protection to cyclists

I'm lying on the ground in the middle of the park, feeling a bit like a crash test dummy. My ears are ringing and my head is held in the vice-like grip of safety gear more suited to a spaceship.

But what I'm actually wearing is a cycling helmet. It's a Hivding, an "airbag for cyclists", invented in Sweden and billed as the helmet for people who don't like wearing helmets. The Hivding promises superior protection in a crash without the need to actually put anything on your head.