Final answer:
The given excerpt from the book characterized by a comedic tone, evident in the humorous interaction between Sam, Andy, and Haley.
Step-by-step explanation:
The excerpt provided is an example of a comedic tone. The situation described involves Sam tickling Andy and causing him to laugh, even though they are in a serious situation. Sam's admonishment of Andy for not treating the situation with the gravity it deserves adds a level of humor to the situation, as does Haley's indignant reaction and the use of a riding-whip. The interplay between the characters and the contrast between the 'seris bisness' and Andy's laughter creates a humorous atmosphere, despite the underlying serious context.