When this was first spotted I thought that the 8% Belgium beer had addled my brain. She was moving down a street, feet first, self controlled by her left hand, partner at her side. Her glasses were 2" long mirror prisms that allowed her to see at 90˙ - so she was looking where she was going.
Not many others in the party saw here - but then I spotted her again in a central cafe. You can't really see the glasses in the photo - it was snatched from a distance with more than a hint of voyeuristic guilt rushing through my blood.