How is it that refill canisters for air horns costs four times as much as butane canisters? Ariel was not happy with the added expense and took matters into his own hands creating a butane horn with flames. While this is not his first butane hack, he has stepped into a larger world of noisy flame throwers. And if you think this duct-taped flaming air horn is a little shady, check out some of my other favorite flaming noise projects.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.