Determinism works both ways. Why precedes the proposition and how follows. Everything in the past may have led up to this point but it is not known that they did until now. You were walking out of the door but that could not be said until your shoulders had made it past the door frame. The door shuts behind you. Before this moment it was true you were walking towards the door but you had not walked out.
You turn around to see see that you are truly and really no longer in the house. The night is cold and dark and the only light you can feel is burning somewhere you're no longer welcome. The darkness stretches on in its infinity and you walk and walk and walk. You feel like you're being swallowed, but not digested. The pace picks up into a run but there's no out running darkness, stupid inky hole that traps the sensible. Everything is lost. Nothing is all around you and inside of you. It never ends.