In ferris Bueller, during one of the parade scenes, a blonde chick with short hair flashes her cooter. She was wearing a dress, but had not bothered to wear underwear.
Since about 4-5 years ago, they edited it out PERFECTLY by putting a cheering person that raises his hand to fit over her crotch at the exact perfect moment it happened.
To this day, with all the modern computer graphics, there hasn't been a piece of smoother editing in ANY MOVIE EVER. If you look VERY CLOSELY you can only barely tell that the guy who raises his hands has been edited in.