Someone had this same vision of walking friars, in a church as I remember it, but they were only visible from about the chest up. When he told a local person about it, wondering about both the vision and the distortion, the person said yes that’s because the church used to be several feel lower.
I wish I could remember where I read this.
I read that one too. England. Some extremely old church or castle that had been added onto over the centuries.