Pigs

i log on to minecraft and spawned in the end I thought it was a glitch their was no enderdragon. Or enderman all I saw was a pig with a sign by it the sign said leave so I assume the world was corrupted so I left and logged onto on another world and I spawned in the end again But this time the sign you have been warned so I got scared so I logged off and I heard knocking at my door. So I got up and went to the door nobody was so I logged on again and this time it was worst I heard screaming and the pig disappeared and I got teleported to a desert.