They said it was too dangerous to enter cyberspace without the buffer of a cyberdeck. They were right, of course; it was dangerous. But he had done it before. Decker slang called it "jacking in naked" when only the decker’s organic brain stood as defense against the dangers of IC and the navigational peculiarities of the Matrix. An organic brain was a fragile thing to Stand between the crystalline fury of ice and the darkness of death.