The apparatus I had experience with was... um... unnervingly fast. It simultaneously broke the neck and shot a steel bolt through the brain, while yanking the cow vertical so the throat could be slit immediately. It went from alive and whole to just plain *DEAD* in a heartbeat. It really hammered home the difference between a living being and a hunk of meat... not much.
To be honest, it made me feel very, very mortal.
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