Pyrotechnics is a potentially dangerous pasttime. If you choose to take this up as your hobby you do so at your own risk. I do not recomend taking this as your hobby or attempting anything on this site. This site is for entertainment and educational means it is not meant for practical use by "anyone". Even if built correctly the things described could still be dangerous. Therefore if you choose to attempt any of these projects I hold no responsibility for what happens. Furthermore any harm or destruction you cause is your problem. However if despite my warnings you choose to try these things do so with extreme caution!!!
I would like to add that I do "NOT" support terrorists or Anarchists in any way!!