I've had an spontaneous pneumothorax when I was a teenager. Had to undergo emergency surgery with only local anesthesia. The surgeon while cutting my chest asked: "You're sure it is this side, right?", which I confirmed. He then said: "Ok, if you're wrong I'm not going to jail alone."
This happened to me in college. Driving home from the movies, chest started to hurt on inhale .. I decided to "sleep it off", which obviously didn't work. Went to the ER in the morning. Got the chest tube and spent about a week seeing if it would heal naturally, then they removed the offending part of my lung, and did a mechanical pleurodesis (a procedure that sticks your lung to the chest wall so it can't collapse).…
Was a little unsettling.