Can't remember a lot of my 20,000 hrs. as pilot but will never forget paxing on Concorde 20 years ago between Washington and Heathrow. Spent the last 2 hours of the flight standing in the flight deck behind the jumpseat ( occupied by an ATCO on famil.). Captain allowed me to remain in situ for the landing, I'm grateful to have experienced an era in aviation where we could share our work environment with colleagues and passengers alike.