The paper deals with nonverbal behavior in a context of the modern psychology postulates on one hand and analyses depictions of nonverbal behavior from the point of view of different genres’ poetics (Shakespeare’ ‘Julius Cesar’ and Plutarch’ ‘Cesar’) on the other. Naturally, both authors unveil hero’ inner world not only by describing their nonverbal behavior, but both in the play and in the biography one of the leading motives is laughter: fear of looking ridiculous makes the hero to make an error, which leads him to the death. Not only fatal to hero external factors influence events, but his own state of mind, his own inner world. This serves to prove both authors’ attention to human psychology and their understanding of its consistent patterns and paradoxes.