If you have an affinity for cannons and a hankering for popcorn, the popcorn cannon is just the high-pressure cooker for you.
A popcorn cannon houses water and kernels of corn inside a sealed iron drum. The drum is turned over high heat, which vaporizes the water inside and permeates the corn. Once the lid is opened, the corn pops and explodes out of the drum like a cannon, according to the video posted to YouTube.
Myth Busters tested out the popcorn cannon some time ago and found that while it took a little longer than expected to reach the optimal pressure, it still works well enough and makes for much more spherical popcorn.
[ YouTube ]