suppose a person had the following unpleasant experience. he was at a party and an acquaintance somewhat cruelly made fun of him and ridiculed him. this acquaintance caused him to feel humiliated and angry. as he leaves the party he momentarily forgets his anger as he necessarily has to thank his host and hostess. on the way home he experiences a nagging feeling at the back of his mind. something which he has temporarily forgotten is troubling him