Well you're talking about just one scene in an entire movie. Your last comment was that the music and SFX for the entire movie is what makes it. That's a big difference. But my comment still stands that music and sound effects alone do not make a great movie.

Yes, the Psycho sequence worked best as it was. Hitchcock himself even said that he could have shot the scene with all the action, but it was even more effective 'psychologically' not showing it.

Please defing your meaning of 'scenario'. Aside from it's own meaning, its not a term used widely in the film industry. Maybe understanding that would help me understand you easier.