Error.666.java

Hello.I wanna talk about something weird.[fake]I maked a new survival world.It was night,but i did not care.I chopped down some trees,and made a house.Got some iron tools,armor,and i was done.Then,my door opened.I was on multiplayer,but i did not know.No one on my World,so i closed the door and ignored it.Shortly,my armor dissapeared.I said to myself:Where is my armor??,and i goed im a mine to get iron.A creeper blowed me up,and i spawned somewhere weird,a redstone block and nether rack.Isaw a command block.It had a wooden button on it.I pressed it and i died.I could not respawn,and i saw it.A steve,but color inverted.I saw a nametag.It said error.666.java .I made a screenshot,but it did not save.I deleted the World and never saw error.666.java again.This is the only sighting.I will edit this when i will encounter it again if it happens.Thanks for reading!