When I directed attention to virtual worlds for the first time, I didn't know people devoted so much attention to their walks. It seemed to me a quite strange, cause eachone can fly in Second Life (and other virtual worlds).
Indeed, on Koinup there are thousands of photos depicting avatars walking
This amazing image by Abigale Heron, called "Hells Bells"
show you that walking could be a way express yourself in a virtual world
click on the image to view it all size