Final answer:
The available excerpts provided do not contain any information about George's actions at sea causing Aunt Daisy to nearly faint; therefore, it's not possible to give an accurate answer to this question based on the text provided.
Step-by-step explanation:
The question seeks to know the actions of George and their impact on Aunt Daisy. From the passages provided, none detail an incident involving George that would have made Aunt Daisy almost faint.
However, since Aunt Daisy is mentioned in the context of wanting to take a boat ride and appreciating formality, it suggests a fictional plot rather than a historical account, indicating the subject is likely English literature.
Without the specific text that details George's actions at sea, it's not possible to accurately answer this question.