I recently uploaded some photos of a recent Christmas party, where I played Santa. Feetbook duly drew a rectangle around the face of a young lady sitting on Santa's lap, for me to tag. Feetbook also drew a rectangle around my right foot, then waited for me to tag it. Fair enough I guess, my profile photo is of my feet. Though I am impressed, my profile photo is of bare feet, taken from above, the Santa photo was taken from the front, and I'm wearing sandals in it. Seriously great face recognition AI that can recognise feet from any angle, in any footwear.