Dickinson's character, from the hips down, with her panties being slowly pulled down her legs in the back of a cab.
Of course, later on, it was discovered that the more explicit scenes were done by a woman about half her age.
I remember that, at that time, pretty much everyone assumed that actress Angie Dickinson actually did that famous shower scene, because of her classic beauty and status she was about 48 then, and still a beauty! Johnson, what she's doing these days, and wonder if she knows she still has admirers after all these years.
Dickinson never claimed that she did the whole scene herself, and, to her credit, people fantasized that it was actually her, thus perpetuating her status as a classic Hollywood sex symbol.