Health N Safety, what health n safety?

An oldie from the net. Looks like it was shot on film. I've wanked to this many times and would love to know the story behind the image. Is it amateur or pro? Did he know he was been filmed? Did he care? Was it his girlfriend behind the camera? A boyfriend? A pervy workmate? He's not really tipping cement into a wheelbarrow naked is he?

Uploaded it to it's natural home, the Butch Construction Workers & Other Craftsmen thread and then had to get reacquainted with the material