My Herobrine sighting started when I saw a Herobrine altar. I was curious so I approached. And then I stepped on one of the the gold blocks, and the fire was immediately put out. I looked around to find out who put it out and then... I saw him. The one and only Herobrine. He attacked but I ran and started flying, because, fortunately, I'm an admin on that server. I have seen him several times since then but no other time was as terrifying.