784

Andrews-in-Valentine looked into the face of his own death, in the form of a HERF grenade held in the hand of the smiling Assistant Director. The object, a Foundation original, was a variation on the classic flash-bang grenade, specifically intended for use against electronic threats. Pull the pin, release the spoon, count to four, and a pulse of high frequency electromagnetic radiation would fire, destroying any circuitry more complex than a lightbulb and battery.

> > [...]

Clef casually popped the spoon of the EMP grenade and rolled it down the hallway. It popped, and the nanomachine colony that had been SCP-784 dissolved into inert slime.

http://www.scp-wiki.net/784incident6