The American Indians popped corn a long time ago. The Indians knew there were three kinds of corn.

In the video, four cellphones are pointed at a pile of kernels that soon begin popping.

In its purest form -- that is, plain air-popped kernels-- it's a healthy, whole-grain, antioxidant-rich snackfood that comes at a pretty low-calorie cost for thosewho like to mindlessly nibble.