Sorry to drag this up again but the original picture was taken around here and highlites a problem of wfp. It's when the building is high and the pavement not very wide.
Personally, I would not have accepted the job for that reason.
Also, I have seen these two doing that building from time to time and they don't worry about if anyone trips over the hoses or if they get wet. I think this is one of the not often spoken about problems with wfp.
During the morning, that is a busy street.