High Speed Movement!
Movietech engineers plinth-mount the 35mm Photosonic film movement for posterity.
The movement itself boasts 12-pins across 4 pull-down claws. These pull the film through the gate ready for 4 solid registration pins to hold it steady. After the exposure is made, the registration pins withdraw and claws re-enter ready to pull the film for the next exposure ... and the process begins again. It's capable of doing this 425 times per second.