"Fire in the hole" is a warning that an explosive detonation in a confined space is imminent. It originated with miners, who needed to warn their fellows that a charge had been set.
The first cannons developed were discharged, shot or exploded by placing a flaming torch to a small hole packed with gunpowder and leading to the main powder charge. This caused the main charge to explode, propelling the cannon ball to the enemy, or sometimes, blowing up the cannon and all standing nearby.
Hence, fire in the hole was both a command to the torch man, and a warning to all around. Over time cannons improved; they became safer, with no hole or fire needed. The command was reduced to fire, while the full phrase fire in the hole became a general warning for the use of explosive weapons. It was subsequently adopted by the United States Army and Marines to give notice that a grenade or satchel charge was being tossed into a bunker, spider hole, or other enclosure. The term frag out is also commonly used. It is not used for all explosions – throwing a grenade in the open is not announced, for example – only those surprisingly close.
Famous quotes containing the words fire in, fire and/or hole:
“Hm, the beacon of the press. In the hell to which all journalists must descend when they die, Mr. Wiggam, we shall sit at red hot desks with quills of fire in our hand and spend eternity on eternity writing about the salubrious weather of that region. Let us serve our apprenticeship here thoroughly and intelligently.”
—Ben Hecht (1893–1964)
“So much of left-wing thought is a kind of playing with fire by people who don’t even know that fire is hot.”
—George Orwell (1903–1950)
“Steam was till the other day the devil which we dreaded. Every pot made by any human potter or brazier had a hole in its cover, to let off the enemy, lest he should lift pot and roof and carry the house away.”
—Ralph Waldo Emerson (1803–1882)