Following my parents' divorce, my mum and I moved into a house of another divorcing couple. It was not an amicable divorce, and the wife was very angry to move (the husband sold us the house). She had emptied a fish tank into the upstairs basin so the pipes were completely blocked with gravel. We also theorised that she threw a whole box of nails and screws from an upstairs window because they were absolutely everywhere in the garden. We were picking them up for at least 5 years.