I just had an epiphany - maybe the walk changes b/c the person has plantar fasciitis. I had a two year bout -- t's one of the most painful things imaginable - I'd rather be in labor than have another flareup, lol. Anyway, the pain was terrible early in the morning, upon first getting out of bed. After walking on it a bit, it would often lessen. However, TOO much walking would make it worse again. Depending upon how I stepped, turned my foot, etc., it could suddenly hurt like hell again. I was always trying to find ways to step so it didn't hurt so much. Sometimes that meant walking on the inside or outside edge of my heel, or stepping lighter on my heels or toes, etc. Could this person have plantar fasciitis? I am in my 40s and traced my problem to when I started wearing flip flops - something I never liked before and will NEVER, EVER wear again, they screwed my feet up so badly. - But the problem is definitely experienced more by overweight and/or older people. Now, my father in law was told HIS was due to lazy-boy recliner use -- or lawnchair use - both of which he sits in frequently. When sitting in those type of chairs, the feet flex or hang in a certain way that causes problems with the fasciia under the foot. Now, I noticed that a certain gentleman (quack, quack) is older, is carrying extra weight, and goes on vacation quite a bit -- there are a lot of pictures apparently taken from a lounger that show his feet in just the position I mentioned. After the perp was trying to pry open that one door, he stood for a bit with one of his feet twisted to the side in what to me is a familiar move to try to ease, if even for a few seconds, the pain under the foot.
Just a theory....