I was walking with a friend about 5 feet behind another woman who was walking alone. As she walked by two men, one of them began to walk with her and was leaning into her very closely, as if he was going to kiss her. She began walking much more quickly and as she moved ahead of him, he reached out to her and squeezed her butt. She didn’t look back, but began running forward at that point. My friend and I, seeing what had happened, also began running so that we wouldn’t have a similar encounter.