We all know the "oh crap" moment. When we're about to tackle something that's momentous and we think we have our ducks in a row, and then a wrench gets thrown into the situation. It happens ever. Single. Damn. Time.
Wedding in the morning? You got your suit pressed from the night before, shoes shined, envelope in the right side pocket, cell phone fully charged, hair already cut. So you walk out the door, ready to go, and you start your car and realize the battery's dead. Or you're a half hour into the drive at the venue when your brother/friend starts blowing up your phone and you realize you forgot to pick them up.
Some wrenches, however are a lot more frightening than others.