Total Recall
In this Schwarzenegger 1990 sci-fi hit, Arnold is approached by a woman offering her services to him and showing off her unique assets: three breasts. Though it's been paused far too many times, you never see more than her face in that moment.
Teen Wolf
In the original Teen Wolf, Michael J. Fox plays a high school student who discovers that he is a werewolf. In one chaotic scene at the school, there's a moment where one guy's zipper is completely down, flashing the audience for a brief moment.