from what I can see the guy must of been soaping up with his eyes shut, or someone put the price signs out whilst he was looking for his squeegie.
If it were an hot day he would be stuffed, all the soap would dry before he squeeged it off.
Is a stepladder really the right tool for the job ?
and why would you start squeeging so low down, surely you would drive the squeegie to the corner first ?
Seriously though, the HSE are looking into this, as are a couple of big trad organisations.