Half a croissant, on a plate, with a sign in front of it saying '50c'
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Guillotine Carjack Shield

Prevent muggings/carjackings
  [vote for,

A thin, titanium plate the eaxct same size and shape as your vehicle's windows which sits inside the (slightly modified) door alongside the window in the closed position. If someone points a weapon at your window or reaches in the window to grab you, simply flip a red-capped emergency toggle switch and the shield slams upward in the blink of an eye, eiher trapping/breaking/severing the would-be criminal's weapon/limb, or at least buying you time to shift into drive and put the pedal to the metal.
21 Quest, Aug 27 2013

Legal Anti-carjack flamethrower http://news.bbc.co....d/africa/232777.stm
BBC news article from 1998 [Tulaine, Aug 27 2013]


       Go by train?
not_morrison_rm, Aug 27 2013

       Why titanium? Sure, it's a sexy metal, but weight is not really a concern and there's tougher knife edge metals available.

       I also wonder if severing or pinching the limb would not cause the trigger finger to spasm, working against your desires.

       Lastly, goodbye to your upholstery.

       Other than that, it's a great idea.
normzone, Aug 27 2013

       What about a portable device that can be kept on your person or in your glovebox, with a small lever that you can pull to rapidly eject a solid metal projectile towards your assailant? This would have the advantage of being useable on somebody who is already in the vehicle.
ytk, Aug 27 2013

       Can I suggest a much simpler alternative?

       All that is needed is a noose of cheesewire set into a channel in the rubber seal of the window, and a pneumatic device in the door body which, when triggered, draws the cheesewire out of its channel and downwards.

       Admittedly, the cheesewire idea is somewhat more elegant than the idea of a titanium plate, but on the other hand the cheesewire is likely to be simpler to install in a normal car.
MaxwellBuchanan, Aug 27 2013

       If you're not worried about breaking or severing limbs, then a cheaper and much less intrusive solution may be the South African notion of a flame thrower mounted beneath the car and controlled by a pedal in the driver's foot well to blast flaming gas at would-be car jackers. Despite concerns raised by do-gooders this was declared legal by the authorities. (See link)

       Seems it never caught on outside South Africa though.
Tulaine, Aug 27 2013

       //Police say they cannot see any legal problems with the blaster - so long as the right people are blasted//

       Don't you just love these third-world countries for their wacky humour? SA, TSA, USA... all the SAs.
MaxwellBuchanan, Aug 27 2013

       Weight of materials is always a concern with vehicles, for a variety of reasons. The device is called a shield instead of a blade because cutting/entrapment is a secondary objective: the primary objective is to place a bulletproof barrier in the window at the flick of a switch.
21 Quest, Aug 27 2013


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