Well, OKAY...but I really really think Cybermen are a better adversary there.

To summarize for you, it was a collar device, charged by USB and good for about 18 hours a charge. It's only good for bikes right now due to the sensing system not working well for other vehicles. When it senses a threat it inflates over your head like a funky macintosh hood. It's not perfect, some types of impacts won't work out well with it and if you were Any Winehouse or had a decent Mohawk it's just no good. At $400 I'm not sure it's worth it but then they claim that helmets aren't as good in some ways. My hair has nothing to do with it. It's the internal injuries to the torso that it does nothing for that kill a lot of cyclists that concern me.

PS You are quite the graphics cat!