what is thiss

When i turned the door knob i expected just a wall but to my surprise it led down into abyss. i decided to go ahead and check when i entered the door i fell into nothingness when i awoke i was in my nice warm bed. i thought it was all a dream until i looked out side only to see lava and fire all around i was looking for someone anyone but any one i found was demented and changed. As i went to the park i saw myself sitting there running around trying to kill people and then he saw me. He ran at me with speed like a car but somehow i was quicker and i ran to the house in the lava only to find the door wide open but in lava i took the chance and jumped through then i woke up normal and fine with nothing wrong. I went to see if the door was still there and it was so i closed it and as i closed it a hand was approaching the door knob on the other side...