Emotions can be defined as an interwoven process, constituted by numerous elements. The means through which we express emotions and identify those belonging to others is given by the face. Emotions’ facial expression is a subject of researches, particularly for those scholars claiming that automatic facial expressions recognition and analysis have been of central focus in fields concerning Artificial Intelligence, Affective Computing and Human-Computer Interaction (HCI). Those researches are even of specific interest in the following areas: neuroscience, clinical psychology, informatics, marketing and security. The main purpose of the experiment, part of an extensive project, carried out in order to study ecologically valid emotional expressions evoked by the visualization of some virtual environments in the laboratory.