Notch use to say herobrine was real and that he tried to help you if you didnt be rude to the MC world, I have even seen him (he was in cow form ) he gave me diamond armor set and wood tool set, but then i was sad because notch officially removed herobrine D: then he started denying the existence of herobrine so I thought Wtf, then I found out some noob posted this ""herobrine is just notch's dead brother and wants to kill everyone, also if you leave your minecraft on over night herobrine will jump out of your computer and kill your family." and MC lost some good people through that noob saying that, and after that herobrine was no longer *stabs adventure update 1.8* you killed herobrine.