A dearth of scientific knowledge currently exists regarding human nonverbal predictors of violence. Using a sample of 178 adults, this study sought to identify a series of nonverbal behaviors the research participants perceived to be associated with the communication of imminent violence. Assuming a boxer's stance, invading personal space, clenched hands, and threatening remarks were almost uniformly associated with impending violence. Several other gestures and behaviors were also perceived to be associated with violence to a lesser degree. Behaviors least perceived to be associated with violence were crying, rapid eye blinking, placing hands on hips, and avoiding eye contact. Analyses by sex and race found only minor, and substantively insignificant, differences, suggesting these perceptions may be innate rather than cultural.