but its a term used since the ~1400 in Arthurian book.. And it also describe a "a term referring to a psychological state in which an individual cannot be certain whether they have been aided or hindered by some force outside the realm of the natural world, or whether what appeared to be supernatural interference was a product of their own imagination" (from :https://en.wikipedia.org/wiki/Chapel_perilous )

so i maybe can say sometime : "iam in a chapel perilous mode yo"...lol