I used to social partner dance a lot. In partner dancing, because it's a physical hobby, boundaries matter a lot. One night, I was dancing out at a jam in Seattle and the man who'd asked me to dance kept leading in a really dangerous, uncontrolled way. Typical of people who lead in dancing with a lot of strength but not a lot of technique -- twisted my body in ways I didn't like, wasn't responsive to the obvious weight shifting I was doing to counteract it, so I said, "Stop doing that move."