Bike helmet showdown: Stanford researchers test new airbag tech

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1. I have few questions about that invention:
   
   1. What about forhead? It doesn't seem fully protected, is there any video that shows mannequins face falling at forhead?
   2. What about long hair? Should they been hidden under this scarf?
   3. How's temperature in summer? If this is something that for example bicycle messenger could use whole day?
   
   4. Edit: one more, who the hell falls of the bike pointing head upsidedown? If reality physics and GTA arcade physics, are two separate things, than why you showing at commercial video pretty much one of the less probable scenario?
2. Two Sweden student girls already made something like this..... It's called Hövding.
3. I don't use the available helmets because they don't look like they would thwart a frontal lobe threat. I would like to see an expanded urethane foam, oversized headband with the top exposed to sunshine. An 8 inch wide headband. Cylindrical helmet. I wouldn't stay married to inflation.
4. trouble is its already hard to get kids to wear the foam helmets how on earth will you convince people to wear this?
5. SNELL standard anyone?
6. Add a trigger to one side connected to a membrane/vavle to the other. Impact triggers rupture and high pressure gas/fluid(mixture) is expelled on opposite side to offset rotational speed with thrust.(imagine the curiosity rover entering mars)
   
   How much thrust will this produce? What ratio of gas/mixture works? What type of gas(s) and liquid(s)? Is this a bomb on a person's head?
   
   I'd love to work on future iterations of active head injury prevention with you!
7. This becomes standard, then in a few years defective air bag helmets, as was the case with cars, show up that randomly blow peoples heads off. Great. Oh and by the way the air bag helmet costs $300