20. The Car Flamethrower

If you live in South Africa, you can now have a flamethrower installed on your vehicle for relatively cheap (about $655). So far the flamethrower has been allowed by authorities partly due to the fact that South Africa had 13,000 car-jackings in 2008. "The Blaster squirts liquefied gas from a bottle in the automobile's trunk through two nozzles, located under the front doors. The gas is then ignited by an electric spark, with fiery consequences".