The Canon Bomb is an experimental device intended for future use in fixing badfic, probably by the Department of Geographical Aberrations. It consists of a wooden crate full of powdered canon that can be set off with a fuse. When it is set off, it explodes, producing a nearly invisible wave that eradicates uncanon and replaces it with canon. It should be noted, however, that its use is potentially extremely dangerous to agents: since agents are usually not canon, they will also be eradicated unless they are either completely out of the way or unless they portal to an already-repaired canon location.
Canon Bomb prototypes can be found in the Department of Sufficiently Advanced Technology.