I saw him and he elaborated on 'the smell of space'. It was the smell of the airlock, or whatever, that had been recently exposed to the vacuum of LEO and then pressurized. He said it was a unique and clearly identifiable smell.
The interesting thing is the vacuum of low earth orbit is pretty dirty. We can make much better and cleaner vacuum on earth on a limited basis, say in a cubic meter or so. Even on earth, after pressurizing a vacuum you can smell the difference. On earth that might be because it is a nitrogen rich atmosphere at that point. But there is smell.
The most poignant thing he said was that he got a call where NASA cut off external communications, like to NASA TV, to talk to him. It was about his sister in law being shot. Each time the channels were cleared after that he wondered what catastrophe happened.
The funniest thing is the difference between Russian and US culture. When there was a possibility of a collision, one that would like destroy the station, the US procedure was to lock everything down in a futile attempt to minimize damage. The Russian response was to accept the inevitable outcome if the station was hit and have lunch. It reminds me of French colleague that always insisted that the problem would still be there in a hour, so there was no reason not to have a peaceful lunch.