In a demonstration at Nvidia's NVISION show, the Mythbusters used paintball guns to illustrate the difference between current CPUs and future GPUs. The CPU's stand in was a single paintball gun that repositioned itself after every shot in order create a picture. But the GPU was represented by an 1,100 barrel gun, which paints the entire Mona Lisa in a single blast.

You can watch the first one if you want, but I'd just skip to about 1:30, when they unveil the real nasty mother. And don't miss the last 10 seconds of the clip, because they replay the shot in slow motion, and it's crazy.