Now You Hear Me

...now you don't. This guy and his inventions are really cool, and the practical uses of the one he discusses most of the presentation are incredible.

My immediate thought was - as they start to be made smaller and cheaper - to talk to people far away without anyone hearing, such as in a crowded room, during a football game, or particularly cool for spies. The coolest use would be to talk to terrorists in the middle of the night, convince them that they're being talked to by God or some such thing, and get them to either walk into traps or give up on terror. But it would be incredibly useful for operations such as the ones Israel just carried out in Gaza - both for communication between soldiers and to warn away civilians from terrorists.