not sure if this is a bug or intentional but you can actually find a way out on to the street via the porch roof and jumping over it onto the passage at the side of the house (opposite side to where the car is parked)....you can leave the property, walk down the street (cars pass right through you) and even wander to a neighbouring street. Here you can walk towards some trees and then the land suddenly stops and it looks like water....if you walk into it you'll fall and be stuck somewhere, surrounded by blue water/sky and a very pretty sunset