Fourth Of Blah

This is my first Independence Day in the Big City. And so far it sucks. KC has a no fireworks ordinance that is lightly enforced yet has most folks afraid to set any fireworks off. Now there a few folks in my 'hood that are making sparkler bombs or acetylene bombs or something as there have been many loud booms in the area. Personally though, I have been out of M-80's and Quarter sticks for a few years now and no longer have any contact to purchase said items. I am also out of Pyrodex to shoot in my little cannon I made several years ago. So no boom boom for me dammit.
  I made my little cannon from some 2 inch cold rolled steel, a piece of 2" x 2" steel and a length of rebar. I bored a half inch hole in the center of the 2 inch bar and then drilled am 1/8 inch touch hole. I then welded the barrel to the 2 inch tubing and then the rebar to the tubing.  Put in a tablespoon of Pyrodex P in the barrel, hammer in some newspaper wadding, add the fuse, jab it in the ground an touch it off. KAFUCKINBLOOIE!!! Yes it's pretty damn loud. And yes it will send a projectile waaayyyy out there. And it makes an impressive cloud of smoke. But no, I forgot to buy the powder so no cannoneering for me. I am going to the Riverfest tonight which will have a very nice pyrotechnic show. Which mostly bore me now as I used to shoot propyro. And sitting in a chair watching is lot different from touching off a five inch mortar up close and personal.
Here is my little cannon. And don't give me any crap about the welding, I was doing it on the QT at work.

The noisemaker......

The business end...

Does this give you any ideas? It certainly did for me. A series of these electronically fired for perimeter defense? And loaded with buckshot? Or some other nefarious loading such as launching noise distraction devises?