When faced with a dangerous situation some psychologists suggest that humans actually engage in an initial ‘freeze’ response. Gray (1988) states that the first response to danger is to avoid confrontation altogether, which is demonstrated by a freeze response. During this animals and humans are hyper-vigilant, while they appraise the situation to decide the best course of action for that particular threat. Therefore, this explanation is limited and doesn’t fully explain the complex factors that underpin the human response.