As a kid in 1966 I would have felt I had died and gone to Heaven to see this. It would have been my ultimate want for Christmas, knowing that I’d never actually be able to have something so incredible.
This has disturbed my sense of reality of what I saw in 1967. Brilliant. (By the way, the Americans have nuclear powered underground boring tunnel machines at 6mph max, connecting various points across the US with supersonic mag lev. Do not tell anyone).