A teenager lost his leg and sustained other injuries after a homemade fireworks bomb exploded.  And, in an effort to prevent others from making such bombs, the media gave a brief description of the technique.  Unfortunately, the media enlightened the public and me about the existence of these bombs.  And so, a quick search on line yielded a “how to” video.  And I suspect that there are now some enlightened folks that will have to give it a try.