This is just a sampling of the videos available on youtube of black powder bomb explosions. It appears to be a popular activity, and there can be absolutely no question whatsoever, after viewing these videos, that under the right conditions - and there appear to be many different versions of that - black powder is explosive; it does go Ka-Boom very convincingly. (Be sure to scroll down to the end.)
Consider this a public service to educate the educator.
You just have to love youtube and the 'interwebs'. Hope you all enjoyed the Mikeb blog video of stupid guys getting their rocks off doing stupid things - HIGHLY EXPLOSIVE things - with black powder.
I'll be looking forward to the explanations of why these videos do not show black powder EXPLOSIONS, by the usual definitions of the term.
For those of you not familiar with the usual definitions of the word explosion, in addition to the video definitions of the term, I am pleased to provide the definition from dictionary.com for clarification:
noun1.2.the noise itself: The loud explosion woke them.3.a violent outburst, as of laughter or anger.4.a sudden, rapid, or great increase: a population explosion.5.the burning of the mixture of fuel and air in an internal-combustion engine.
and the word explode, also from dictionary.com:
You're welcome.verb (used without object)
ex·plode[ik-splohd] verb, -plod·ed, -plod·ing.1.2.to burst, fly into pieces, or break up violently with a loud report, as a boiler from excessive pressure of steam.