Very similar to the idea I'd read in Omni Magazine some years back when they were talking about theoretical propulsion units for future spacecraft. Among them was a design that even saw some usage in the movie "Deep Impact". IIRC, the engine created the equivalent of a small nuclear explosion to generate tremendous amounts of thrust. I think the yield was higher than the 1-ton TNT equivalent that they're talking about in this article, but still......veddy interestink!
