Movie about woman in white tank top who falls in the dirt

When I was a kid I watched a movie about a movie about a woman in a white tank top. Now I don't remember the title but I do remember this one scene. In the scene, the woman and her boyfriend were talking, he left her by herself and she fell in the dirt on her back and the back of her tank top was covered in dirt. Her boyfriend came back, they talked a little then he left her by herself again and she fell in the dirt again, this time on her front and the front of her tank top was covered in dirt. Her Boyfriend came back again, they talked and after that I don't know.