You got that right. Also the sound it makes is like something out of a horror movie or Darth Vader breathing.
A housemate I had in grad school caught polio as a child and limped from having one leg shorter than the other. But he always had a cheerful attitude. Had his PhD in biology, then later got an MD after marrying a doctor. Some folks just never give up.
Yes the noise an iron lung makes is truly frightening.