The phrase comes from NASA's Apollo 13 mission in 1970, when astronaut Jack Swigert reported an oxygen tank explosion to Mission Control in Houston. The wording was slightly different in real life, but the 1995 film Apollo 13, starring Tom Hanks as Jim Lovell, fixed the shorter version in popular culture. Since then the line has moved far beyond space history, becoming a universal shorthand online for the exact second a small technical issue turns into a serious, unmistakable crisis.