You take a few deep breathes to calm yourself. You hold your head at chest height and look around the store. There is nothing obvious in the front of the store. It is too normal to be of any help.
So you turn around and look toward the back of the store. You notice a black curtain that you are sure was not there before. As you reach forward, you nearly drop your head. You suddenly realize a benefit to your condition. You put your head down and move the curtain only slightly. At this vantage, you can see in without anyone noticing. Seeing only boxes that are usually found in a store room, you pick up your head and walk in.
From the higher view you can see that one wall is covered in shelves but is behind glass. You walk over the the wall and see that the shelves have heads. All of them sitting there (so to speak) with their eyes closed. They could just be models, or mannequin heads; you try to convince yourself. The reflection in the glass tells you otherwise. You see the stub of neck still on your body. Healed over like you head was never there.