Sometimes a lawyer will need to request an extension to file responses or pleadings. Friendly counsel usually consent to an extension as a professional courtesy, but sometimes a lawyer will need to request an extension from the court and explain why the extension is necessary. I've seen some interesting explanations, but I agree with Above the Law that this is one of the most bizarre.
While requests for extensions commonly arise from medical issues, the death of the lawyer's family cat is a much less common excuse. And the amount of detail in this request seems excessive. But it makes for a fun read nonetheless.