The flaw is whatever x-wise you pick, you have the torch in the "wrong" hand either going up or coming down. Also, hand rails weren't a thing in most medieval

The flaw is whatever x-wise you pick, you have the torch in the "wrong" hand either going up or coming down. Also, hand rails weren't a thing in most medieval staircases; you were expected to just not fall, and when you did there was no one to sue.