Once, when I was young, I saw guys jump out of a SWAT van, guns, vests, and all. From that day on, whenever I saw a UPS truck, I expected the "army guys" to jump out the back of it. I was convinced that this happened all the time and that the neighborhood was filled with vans of army guys hunting robbers.
It would be cool if they did (though undeniably scary). Like the modern version of the childhood game, "Cowboys and Indians".