Hendrickson's Magic Window
An illusion of glass has given this storefront the name "Hendrickson's Magic Window". Standing at the corner of the display window(s), center your body on the corner, raise leg/arm nearest the street, your reflection will be mirrored in the plate glass window.
Of course I had to see what this was all about. It took me awhile to figure out where I was supposed to stand (not the sharpest tool in the shed here) but I ended up with this completely unflattering picture »
Try it out for yourself sometime ; )