For those of you who don’t know, “process trailer” is Hollywood slang for a big flatbed trailer that you park a car on so you can put a camera outside the window and tow it around and make it look like the car is moving, even though nobody is driving it. Last week I got to ride outside one and pull focus. In our case, the tow vehicle was a modified ambulance. The director and all the production staff rode in the back of the ambulance and watched playback on a monitor. Check it out:
Here’s me swapping very expensive lenses (don’t worry, the trailer isn’t moving in this shot):
And here’s a picture of the “hostess tray” that hooks onto the picture car and supports the camera: