It's the classic 1960's safety film/video from Caterpillar. There are actually two, or maybe even three versions.
The original is 1960's, because I remember seeing it in 1969. I have seen a 1975 version, which is different to the original, and I think there's a 1980 version.
Google it, and you'll find copies on Youtube, other free video sites .. and sites selling copies. I'm sure I've even seen it for sale on eBay, but there's no copy on eBay at present.
Full of cheesy acting and laughable stunts .. but the message still comes through, loud and clear. I recall, we rolled in the aisles with laughter, at the transparency of the stunts, when we viewed the original (film) in 1969, when I was in the Military .. but we got the message, and never forgot it ..
Look for the huge paper-mache rock, that falls out of the loader bucket, over the dump truck side, and lands on the trcuk driver standing by the truck.
It was so huge .. if it was real, it would have squashed him like an ant .. but it's so obvious, that it weighs nothing .. and bounces off him like a beach ball ..
"Shake Hands with Danger" ..
http://www.google.com/search?q="sha...ox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA
If you have trouble finding a copy for sale, ask your local Cat dealer if they still sell copies.