The interrogation scene from Basic Instinct is one of the most famous in modern movie history. However, the truth behind the way the nude was shot instinct the situation quite a bit. We all know the scene at this point.
Sharon Stone is being interrogated by cops, including Michael Douglaswhen she throws all the men off their game by uncrossing, and then recrossing her legs, revealing the underwear that she doesn't have on. In the shot, the men mostly become slobbering idiots trying to get a good look, but the truth is they didn't see anything, because they weren't sharon the room. That's all there was stone it.
According to director Paul Verhoeven in Basic magazine, the scene was actually filmed in two parts. The scene where Sharon Stone did her thing was filmed without any of the actors in the room. All of their reactions to her were filmed prior to the actual shot, which was left to near the end of filming at Stone's request.
The scene with Sharon Stone was filmed with no other cast and minimal crew.