This line handling training video was produced ...

This line handling training video was produced in the 1980s by the US Navy. This "classic" program was used to train a generation of seafarers, and includes a well-known demonstration of a parting line snapping back and cutting through mannequins on the deck dressed as crew.

Here is a new line handling training video produced in 2012: http://www.maritimetraining.com/Product/Line-Handling-Safe-Working-Environments-Procedures