True Story:
During the filming of VERTIGO, one of the crew came up to Hitchcock and said 'we have a problem'. Hitch said, what's the problem.
The guy explains that on certain angles, Kim Novak who wasn't wearing any underwear ... well you could look right up her dress and 'see her business'.
Hitchcock replied, Yes, that is a problem. I just don't know if it's a lighting problem, a hair dressing problem or a makeup problem!