The Arthur Dent method, essentially.
You are probably thinking of the movie Salvage.
In that movie, they used a rather different method of launching a rocket to space.
Instead of rocketing to space at break-neck speed, the premise was to launch slowly and gently, and return for a soft touch down. The disadvantages were that far more fuel would be needed or as they did in the movie, use a fuel with a lot more energy but with the drawback of being highly explosive.
I have no clues if what was proposed is valid in any way.
That was the plot of the pilot movie, which was followed up by a TV series called Salvage 1.
In principle, that’s true, but in practice, it’s hard (and expensive) enough to do it fast, and doing it slowly is just burning money.
You can now?
*edit: Ok, now that I read the article, I seem to remember this. I still don’t see them ferrying people to the top on a tour any time soon.