Ever wonder what all those strange credits are when they roll by at the end of a film? I used to, until I moved to LA, where I started meeting Best Boys and Dolly Grips with their kids when I took my son to the playground—yes, Hollywood, where you meet Gaffers and Armourers at your average Saturday night house party. So I started asking questions, and here's what I've learned: 1. Boom OperatorNo,