I was walking up and down stairs to houses to see if any doors were open.Then i stole a car and got a wanted level and I started searching for doors again and everything became black and whiteand there was a staircase going down into the bottom of the map. Everytime I entered this place everything disapered except for the staircase and i didn't want to get arrested, but now I can't find the staircase. Has This happend to anyone?