Will showed the sandpiper to me and Jackie Knowlton. After they left I lost the bird, but luckily it was re-found and several other people saw it. The bird was still there when I left at about 5:15. I posted a photo on flickr: https://www.flickr.com/photos/marlinharms/36844998262
When it ran or walked it had the upright posture in Will's photos. My photo shows a horizontal foraging posture.