I still recall when, if you saw someone talking to themselves in the street, you gave them a wide berth. These days, if you're not jabbering away to yourself in the street, you're the odd one out - and that's the premise behind the story.
Anything else will give the story away, so I'll leave it at that.
Below are links to my Canterbury Tale published by Coscom Entertainment, my most recent Global Short Story Competition winner, my short-listed story for the National newspaper, Abu Dhabi's, annual short story competition and a story that appeared on the Every Day Fiction site - where you can leave a comment:
http://chaucers-uncle.weebly.com/index.html
http://www.inscribemedia.co.uk/assets/october-ebook.pdf
http://www.thenational.ae/arts-culture/short-story-a-day-for-decisiveness
http://www.everydayfiction.com/the-d-day-diorama-by-paul-a-freeman/#comments
Happy Writing!