Oh what a difference a shoe makes

In the past, when I wanted to think over a plot problem, I would take a long walk. I was one of those guys who slumped down the street, head lowered, probably muttering to himself (which is no longer so alarming thanks to cell phones), solving my stories as best I could.

Then came the pain. I've always had knee pain, but my ankles finally began to hurt, and my heels and my feet and… wow. It got bad. I was born with twisted legs, and they've always been a problem, but this was the worst...