Comment Two more fun failures (Score 1) 250
1) Some new naval warship on its shakedown cruise had to be towed back to San Diego because its Microsoft OS bluescreened.
2) When NASA's shuttle engines were being tested, two of them blew up on the test stand. Some programmer neglected to factor in the fact that a large butterfly valve takes time to close. He issued the command to start closing at the time it should have been completely closed, and boom!, no more engine.