I worked on an international doco with the cam assist flying his drone ( great shots!) and as I couldn't do sound while it was up I helped him set up ( ahhhh, my inner nerdiness! ) He let me fly it as thanks, but boy did he generally pucker up when he thought I was heading straight for the mountain side!!
We had problems getting his batteries through security occasionally due to their being odd shapes and sizes, so I made sure I got through ahead of him....