Nearly everyone exhibits it (even you!), and it can hurt us even if all we do is silently hope the jerk in the next lane spills coffee in his lap. Aggressive driving leads to more aggressive driving because we assume others behave badly on purpose, says Christine Wickens, who co-wrote three studies on the topic. “If we attribute [poor driving] to deliberate, intentional meanness, we tend to be more aggressive ourselves,” she said. Read related story.