Which of the following behaviors may indicate imminent danger of physical assault?

The boxer stance is often associated with a heightened state of aggression and readiness to engage in a physical confrontation. This stance typically involves positioning the feet shoulder-width apart for balance, with fists up in a defensive or offensive posture. This behavior suggests that an individual may be preparing for a fight, indicating imminent danger of physical assault. It reflects both a psychological and a physical readiness to defend or attack, making it a critical behavior for law enforcement professionals to recognize as a potential precursor to violence.

In contrast, the other options, such as a calm demeanor, friendly gestures, and closed body language, convey peaceable intentions or unassertive behavior, which do not indicate an immediate threat of physical assault. Understanding these cues is vital for officers to assess situations accurately and ensure their safety and the safety of others.