Hello, I wrote an answer a while ago about instances of the Supernatural as they appear in a leading 10th Century German Chronicle. Certainly they appear to have been given some credence. In particular, the appearances of ghosts or visions seems to be broadly accepted as a phenomena potentially indicative of an individual's guilt. Similarly, outbreaks of the revenant dead are noted, in a tone that assumes that this will be accepted as a possible occurance. Meanwhile, in contemporary English society, it appears there was a commonly held belief in what we might today term 'the fae' - elves, pixies and the like. Certainly contemporary medical texts contain treatments for dealing with Fae curses, particularly on livestock.

I am confused however as to how the supernatural relates to time-travelling cars and cranes. I wrote an answer here which talked briefly about medieval cranes; while the modern method of propulsion is different, the design and basic functions are broadly speaking similar, and while a Medieval person may be shocked by the size of a modern crane, they're unlikely to think it's somehow unnatural or otherworldly. Medieval people weren't idiots.