Judebert writes "While some may argue that any modern processor without a heat sink already exhibits this behavior, UCSD chemists have discovered that properly doped computer chips are actually explosive. Standard techniques are used, and they function just like normal computer chips. Better yet, they burn clean, making them ideal for chemical analysis. The article sites other uses, such as micromachine propulsion and military explosives, but I imagine this woudl make for the ultimate in copy protection, as well: "Unauthorized copy detected. This system will self-destruct in 10... 9..." Science Daily also has a copy."