When the Happiness ends.

Imagine, one day you go out of your house, you are walking alone like everyday, but in a moment your head turns back and see a person. I can describe the moment... He is tall, slender, fine, dismal, and he have a creepy smile in his mouth, you make scared and he gives to you one question... "Who are you?" Whats your answer? Probably you can say "Im a person" "Im (Your name)" "Im engeneer" "Im a serious person"... but you are not answering the question, you answer the questions: "What are you?, Whats your name?, What do you do for a living?, How are your personality?" but not the question "Who are you?", This night think in that question... Who are you? and try to answer it, I give you to homework...