Which behavior might indicate a serious threat according to pre-attack postures?

The behavior that might indicate a serious threat according to pre-attack postures is characterized by the "boxer stance." This posture often involves a specific positioning of the body that suggests an individual is preparing for a confrontation or is in a defensive posture. The boxer stance typically features feet shoulder-width apart, hands up, and the body slightly leaned forward, which can signal readiness to engage in a physical altercation.

Recognizing such postures is crucial for law enforcement and security personnel because they can serve as warning signs of impending violence. The awareness of these subtle cues can help officers to assess situations more effectively and take appropriate measures to de-escalate potential threats.

The other options reflect behaviors that do not typically suggest imminent aggression. Friendly conversation and a calm demeanor suggest openness and non-threatening intentions, while excessive eye contact can be an indication of various social behaviors, not necessarily of aggression or a prelude to a threat.