Canadian movie director James Cameron is known for doing some amazing things, in a big way.

He has directed some of the biggest movie blockbusters ever including Avatar, The Terminator and Aliens.

In 1997 he directed the film he is perhaps best known for, Titanic.

This year–100 years after the original Titanic ship sank to the bottom of the ocean–Cameron has gone down to the ocean floor himself, to the deepest point on Earth.