Wouldn't you love to have one of these to discourage road rage during your morning commute. The Cobra - Viper has a non-threatening appearance, but with the touch of a button, you can deploy a large caliber attitude adjuster.

(Photo courtesy of Ibis Tek)

The roof rolls back, and this puppy is ready for action in about 10 seconds. It's also heavily armored. They start at around $500,000, but night vision and the 40mm grenade launcher are extra.