That actually looks like it would be a lot of fun. Now that I am in pretty damn good shape, I think I could come close to pulling one of those off...but that damn wall would probably be my downfall.
They do have something like that in Piqua. It involves a grueling one block walk from a fast food joint to a bar. The part that separates the obese from the morbidly obese are those who are able to waddle over the six inch curb without having to waddle over to the wheelchair ramp. The record time was a six hour waddle for that 15 foot trek.