OK, it finally dawned on me.. I just remembered something.. (This is all IRL) the day that I first played the "Demo" of MCPC was 1 day and 3 years ago. And something happened when I first played. Now, people keep saying that Herobrine is fake, or that he's real, but I know the truth.. let me tell you why....

     I spawned in a normal world, and it was night before I knew it, I had ONE wood sword, a wood axe, and 34 wood planks. When night fell, I knew that I was in DEEP trouble. At first stuff seemed normal as the night went on. I was blown up by a creeper, shot by a skeleton, and starved to death during the night, and the night was endless it seemed. Then, strange things started to happen, I saw a hole that looked like TNT has just went off, fire on a mountain side but no lava, and.... the worst thing... I ever experienced in Minecraft.... first night, there were AT LEAST 35-50 ZOMBIES coming at me. This was NOT normal, I could tell. Then, I went to turn around to run away.... standing on top of a tree... looking down at me... holding a diamond sword.... was a person with white eyes.... next thing I knew, he was gone. I looked back, and there were more mobs after me, Creepers, Skeletons, Zombies, Spiders, Endermen, Midgit Zombies (I freaking hate those things..), and to my surprise, I heard music.. something like from a horror movie... it was coming from the game... I turned back in another direction and RAN for my life! I was doomed. After 3 deaths, I had nothing but dirt in my inventory. The night didn't end though. As I looked ahead..... I saw HIM looking at me dead-on. He charged at me, and before I knew it, I was dead.... I got of the game and I reported it to a friend of mine and they said that people have been "reporting" sightings of this guy, but never got him on the first night. I did though. I got good at the game and I was skilled in fighting and PvP, I kept getting those sightings again. But he did nothing to me. Then, one day, I was heading into a mine-shaft. I heard that music again. My friend told me it was something called "Disk 11". I heard that and it scared me. I looked on the wall of a cave and there was a single sign, and on it, said "WATCH OUT". And under the text said "-H"... I knew exactly who it was. In the chat was a scramble of letters, one spelt a word... "Herobrine". I broke the sign and I turned around... and to my eyes, there he was, right there, looking at me. I had iron armor with a diamond chestplate and a diamond sword with no enchantments.. but he only had an OP diamond sword... I was screwed BIG TIME.......... in the chat, he spoke "I will rise, don't think I won't..." as he left, not attacking me or anything. He just disappeared. I checked the list to see who was on, and it was only me. I decided to exit the game for now and quickly tell my brother, he didn't believe me!! AND HE HAS PLAYED THE GAME AS LONG AS I HAVE! Except he plays PE and not PC. Next day in RL, I told my friend, and she told me that Notch said that there was NO "Entity 303". I asked her who that was. She said "Herobrine, well that's what they're calling him, but he is titled Entity 303 by expert players. The whole rest of the week, I kept thinking about him. I even drew him out on a piece of paper, my art skills at the time were decent. The next time I got on, he was there, waiting for me, only, he destroyed EVERYTHING, lava filled caves, trees without leaves, and netherrack on the ground. My game crashed. And in the Error thing, said "I will rise (303303303303303303303303303)" I got scared, I never played it again. 

To this day, I think back on it, and I forgot my Mojang password. I am going to play it again when we get more money. "Herobrine has been supposedly been deleted" someone said to me. When I got my tablet and I played survival with my bro, I decided to go mining, and I thought I saw him, but it was only and Enderman, to check I walked over to it. Then I got hurt from behind and died, but nothing came up in the chat... just "LittleAnnaSmith was killed by          ". My brother saw it too and he shrugged. I thought that it was stupid zombie, but I didn't hear anything, then again my volume was down so...

This is all 100% true, I was one of Entity 303's victims in Minecraft, he IS real and he always will to me. Don't let him get you like he did to me.