A couple of years ago I heard Neil Armstrong interviewed by Terry Gross on NPR's Fresh Air. He was talking about manually piloting the Apollo 11 lunar module in extremely stressful conditions. Terry asked him if he was nervous. He said no, because he was able to rely on his training.
Also, my spouse tells me he read somewhere that Armstrong's heart rate and breathing were monitored, and they really didn't go up during the hair-raising manual navigation.
I have googled the death out of this topic, and I can't for the life of me find this interview. I have saved hundreds of Fresh Air podcasts on my hard drive, and if I knew what date to look for, I would probably find this interview in my archive.
Please don't tell me I imagined the whole interview. It had a big personal influence on my life.