Who should be notified immediately when aggressive behavior is directed towards a trainer?

The best choice in this situation is to notify the senior person when aggressive behavior is directed towards a trainer. The senior person typically holds a position of authority and responsibility and is often in a better position to address the situation effectively. They can assess the severity of the aggressive behavior, take appropriate measures to ensure the safety of all involved, and implement any necessary interventions or disciplinary actions.

Notifying the senior person first allows for a streamlined and organized response, ensuring that the issue is handled by someone with the authority to make decisions and protect the well-being of the trainers. This helps ensure that the matter is treated seriously and not overlooked.

While other choices may also seem valid, notifying the head trainer, management team, or other trainers could lead to delayed responses or complicate communications. A direct line to the senior person is often the most efficient way to handle aggressive situations in a training environment.