Okay, laugh at my expense all you care to. I say again that there is NO explosive charge just a VERY small smoke effect. Modern BP is very slow burning as as such needs confinement and resistance to create pressure as it ignites. The expanding gasses being restricted by the container, whether it be a thick paper tube or metal pipe, it is the buildup of pressure withinn the device that creates and multiplies the explosive force. A very small amount of BP, such as 1/2 teaspoon, loosely contained, in this case by loosely folded alum foil and a single peice of duct tape has only a theatrical smoke effect and no explosive pressure.
I must admit that I am surprised by the insulting tone of your posts and saddened that you would assume that I am a total idiot. I just wanted to share what I thought was a fun and funky little "piratical" project and I will be sure not to make the same mistake again. This has not been an enjoyable experience. I thought this was a forum to share interests, information and experiences, but to do it in a fun, respectful way.
I'm sorry you think I'm stupid enough to blow off my own hand or arm, but I am glad you were able to derive some entertainment out of it.