How Aardman faked 300-mph motion blur on The Wrong Trousers' toy-train chase by moving the camera, not the train

Inverse's retrospective on the making of Wallace & Gromit: The Wrong Trousers (1993) recounts how cinematographer Dave Alex Riddett and the camera crew created the model-train chase's sense of speed without any motion-control hardware: rather than animate blur into the puppet itself, they physically pushed and pulled the camera -- mounted on a homemade dolly and crane -- along the train's own track between exposures. Riddett is quoted describing the train as travelling at "the equivalent of 300 mph -- or 10 centimeters per frame"; an earlier, more literal test speed read as unconvincingly slow, and the production found the shot's energy only once it deliberately exaggerated both the travel distance per frame and the resulting blur. Aardman used a related camera-driven approach for the chase in the sequel A Close Shave. The durable fact -- that physically moving the camera during a long exposure is a distinct route to stop-motion motion blur, separate from go-motion's puppet-side approach -- is folded into the new Wiki page Motion blur and smear techniques in stop motion.