The invisible bike helmet

[pinball god]

Neat video and concept but I don't think a good one for kids or weak riders

[Crashramp]

An air bag for your head! I like it, though it certainly blends in better in cool climates where your likely to wear a scarf. It's a bit harder to imagine it blending in with the typical Aussie summer wardrobe of singlet and shorts.
 I wonder how it could translate to motor bike riders though.

[swinks]

Great find, very inventive - good on the girls

[Caveoftreasures]

I thought it was very very smart...kids are the highest percentage for head trauma, and anyone falling off/getting hit really could benefit.

Those ladies should be extremely proud of themselves. It just goes to show that women are just as smart, or smarter than us boofheads. 
Thanks for sharing a really cool video.