As a side note, FMDeCorba actually built, and routinely shoots a black powder cannon. He uses it for art projects, firing paint filled projectiles. Check out his signature for pictures.
And he once shot a half litre bottle full of paint through the wall of his atelier and into the next office, where it exploded and covered the unlucky fellow sitting there in red paint. A glorious moment in time for performance art!
I wish I could have been there to see it.