Dust or vapor explosion? Easily doable, especially when you hit that sweet spot that is the resonate frequency.... and with all the subtlety of ten-thousand raving screaming maniacs with sledge hammers. 
And obviously there should be a limit on the mass that it would affect. I'm thinking roughly the equivalent of door that is 6x9 feet with a maximum depth of about two feet. That's roughly about 3.6m^3. The charge would only be good for one, maybe two walls, depending on their thickness. Sound reasonable enough?
And obviously there should be a limit on the mass that it would affect. I'm thinking roughly the equivalent of door that is 6x9 feet with a maximum depth of about two feet. That's roughly about 3.6m^3. The charge would only be good for one, maybe two walls, depending on their thickness. Sound reasonable enough?