Comment Toy Gun I saw in Scientific America (Score 2, Informative) 306
Flipping through the back pages of SA while at the dentist office, I saw this neat gun the blows fog rings lit up by blue leds. They even have an Airzooka verison.
We warn the reader in advance that the proof presented here depends on a clever but highly unmotivated trick. -- Howard Anton, "Elementary Linear Algebra"
