Describe a scenario in which intervention is necessary.

Intervention is necessary when a patron is trying to drink after displaying signs of severe intoxication. In this scenario, the signs may include slurred speech, impaired coordination, or difficulty understanding basic commands. Such indicators suggest that the individual has consumed excessive alcohol and can no longer make sound decisions regarding their consumption.

Allowing them to continue drinking poses a risk not only to their health and safety but also potentially to the safety of others. An effective intervention would involve stopping further alcohol service and possibly assisting the patron in arranging a safe way to leave the establishment, such as calling a cab or a friend. This proactive approach is essential in promoting responsible alcohol consumption and preventing situations that could lead to accidents or alcohol-related harm.

The other scenarios do not indicate a need for intervention as the patrons mentioned are either drinking responsibly or engaging in normal social interactions, which does not raise immediate safety concerns.