No, no, these things tend to happen when your planet is located in a Plural sector (In our case, plural Z). Possibly one of the girls was pulled in from a diffe

No, no, these things tend to happen when your planet is located in a Plural sector (In our case, plural Z). Possibly one of the girls was pulled in from a different timeline when the earth reasserted itself after the vogon demolition. Or, quite possibly, the golden balloon was a remanifestation of the golden bucket, also known as the heart of gold, which is the center of the infinite improbability drive, and everyone knows that the field it generates has far reaching but relatively minor consequences on the lives it touches.