There's a scene in Monty Python and the Holy Grail where the lord of Swamp Castle explains to his son that everyone thought he was daft to build a castle in a swamp, but he did it anyway.
It sank into the swamp.
"So I built a second one," he says. "That sank into the swamp. So I built a third. That burned down, fell over, then sank into the swamp. But the fourth one stayed up."
