In 1959 researchers at Australia's Royal Prince Alfred Hospital injected a volunteer with curare, the same stuff that indigenous peoples in Central and South America put on blowgun darts to paralyze prey. This caused the volunteer to stop breathing. "Physiologically, he will be like a man drowned or asphyxiated," says the narrator.
The rest of the film shows the researchers keeping the man alive for an hour with differen kinds of artificial respiration apparatus. They were successful.
I wonder if the patient was conscious during the experiments. I hope they paid him a lot of money for risking his life like this!
One YouTube commentor noted: "From 8:08 to 9:11 (and possibly longer but they cut the video so I can't know for sure) the man received absolutely no oxygen."