An observers' reaction to the suffereing of his enemy.
D000339:Affect; D000374:Aggression; D001290:Attitude; D004644:Emotions; D005059:Euphoria; D005246:Feedback; D005260:Female; D006167:Guilt; D006791:Hostility; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D011336:Probability; D011678:Punishment