The line comes from NASA's Apollo 13 mission in April 1970, after an oxygen tank explosion crippled the spacecraft on its way to the Moon. The actual report from the crew was worded slightly differently, but the 1995 film Apollo 13, with Tom Hanks playing commander Jim Lovell, shortened it to the version most people quote today. The phrase entered everyday language as an understated way to announce trouble, and online it survives as a reaction clip for technical failures, accidents and plans that suddenly stop working.