19 produced screenplays, many more sold.
Ages ago, I shot something like this from the back seat...
I took an exercise gizmo called a Twist & Turn (a lazy susan) and attached a board to it (nailed it to the center). On one end of the board I screwed a camera mount for my Bolex (told you it was ages ago) and the other end had an eye screw. Mounted the camera to the underside of the board, tied some fishing line to the eye screw. Sat in the back (with my Nagra) and we drove across the Golden Gate Bridge with the camera aimed at the two actors having a conversation, then I pulled on the fishing line so that the camera tracked around the outside of the moving car and shot through the back window for an over their shoulders shot. In moving traffic.
A friend of mine once tied me to the hood of his car with some old rope and game me a camera so that I could film a high speed car chase. Great shots at about fifty miles an hour... but I'm never doing that again.
Hitchcock did it with a freakin' giant 35mm camera that was too heavy for a cameraman to carry, so it was on a dolly the whole time: