I saw this film many years ago, it's how I learned to fly.
E.g. Starting up in the hangar, yep, saves walking twenty feet and keeps the floor swept.
Chases in congested areas - I always did my police pursuits at six inches agl, bouncing off the high street.
Some wussy observers did seem to get a bit upset about it at first. But they knew nothing. I just told them: "Look, Larry Hagman does it!"
They then all agreed "Well that's OK then."
They never did spot the noise of the rotors shutting before we landed; so I kept that fun trick to myself.