Murphy's Law
If something breaks and stops you from doing something, it will be fixed when you no longer need it, are in the middle of something else, or don't want it fixed because you don't want to do what you were supposed to.
If something breaks and stops you from doing something, it will be fixed when you no longer need it, are in the middle of something else, or don't want it fixed because you don't want to do what you were supposed to.