Construction workers find 400kg anaconda on their site

A bunch of Brazillian construction workers ended up with a bit of a mare after discovering a 10m, 400kg anaconda wrapped around their equipment. 
Apparently, the snake died as a result of being wrapped in chains. Yikes. 
We're not sure if this is 100% real, but it's still bloody freaky. 
And to think the worst thing that most of us get on a worksite is a bit of rain...