Only In Indonesia 10 - Coconut-Harvesting Monkeys - "Beruks"

In Indonesia, pigtailed baruchs are trained to assist in coconut harvesting, providing a cost-effective labor solution. These monkeys undergo a training period of 2-3 weeks to learn how to climb trees and select ripe coconuts. They are recognized by their short tails and distinct fur patterns. However, they can be aggressive if provoked, as evidenced by an incident involving an American tourist.

What happens if the monkeys do not follow the directions given by their owners?

What incident is mentioned regarding an American man and the monkeys?