If a film set were the army, the grips would be the infantry. They push and pull production along behind the camera and are the main reason why a lot of movie magic is able to happen.
If you've ever wondered what the job of a grip is and what is so fascinating about it, then watch this 11-minute short doc and it will explain all to you.
Grip It Good is voiced by cinematographer Mark Vargo (Rise of the Planet of the Apes, 3:10 to Yuma, Poseidon). He has a small handful of other helpful videos on his Vimeo channel for those who are interested in learning more about camera and lighting tricks.