Um.
First off, that doesn't make sense, cuz you wouldn't hear them if they already murdered you.
Second off, how many times have you been murdered to have heard their laughter?
Third off, AREYOUOK?????????
Im sorry! I didn't mean to make you sad.
Its better than thinking of your favorite character from a book/movie cuz they are not even in our world. Isn't it more comforting to know that the other person knows you exist as opposed to someone who sadly isn't real?
(if you can't tell, I'm a major bookworm)