In the match that would decide who would fence for the gold, Germany's Britta Heidemann landed a match-clinching touch.
But was it in time? South Korea's Shin A Lam didn't think so.
And Shin A Lam, now in tears, refused to live the piste (the platform that they fence on). In fencing, leaving the piste means that you have officially accepted the judges' ruling. And seeing as the clock didn't start, and she should still have a shot at gold, she sat down. It's the filibuster of fencing.
So she refused to leave. Check out the photos...