What is "fire in the hole"

interj. A warning of an imminent explosion in a confined space, expecially a grenade

"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 phrase appears in this sense in state mining regulations, in military and corporate procedures, and in various mining and military blasting-related print books and narratives.

NASA has used the term to describe a means of staging a multistage rocket vehicle by igniting the upper stage simultaneously with the ejection of the lower stage, without a usual delay of several seconds. On the Apollo 5 unmanned flight test of the first Apollo Lunar Module, a "fire in the hole test" used this procedure to simulate a lunar landing abort. Gene Kranz describes the test in his autobiography:

The fire-in-the-hole test involved shutting down the descent rocket, blowing the bolts that attached the ascent and descent stages, switching control and power to the ascent stage, and igniting the ascent rocket while still nestled to the landing stage.

Fire in the Hole is the fifth album from Hip Hop group Brand Nubian, their second reunion album, released six years after Foundation.

Fire in the Hole is a three story steel enclosed roller coaster at Silver Dollar City in Branson, Missouri. The ride was built in-house by Silver Dollar City in 1972. The ride is often referred to as a cross between dark ride and roller coaster. A similar ride, " Blazing Fury", was built at Herschend Family Entertainment's other theme park, Silver Dollar City Tennessee, in 1978, now known as Dollywood.

Fire in the hole is a warning used in English-speaking countries to indicate that an explosive detonation in a confined space is imminent.

Fire in the Hole may also refer to: