The manual lathe is the most dangerous piece of equipment in a shop in terms of fatalities. They cannot be made ‘safe’. You can only train people how to use them safely and not put idiots on them.
I’ve seen the chuck key of shame used and support its use. My rule was one chuck key fuckup, second offense, immediate termination.
I used to have a safety presentation on lathes. It was called, “The Happy Fun Lathe Safety Presentation.” Kittens and puppies on the title and chock full of gore.
My presentation had the Russian video where the kid gets wrapped up around a bar. Also had the pictures from where the guy got wrapped around a chuck and there is an eyeball sitting on top of the pile.