The key words here are if you know you missed the ball, I had a case last year that I was sure I made the ball (6 ball in this case, pretty much over the top). Almost everyone that saw it thought I missed it including the judges. But I have also been judging similar cases that are almost impossible to call due to apexing right at the buoy. I usually give the benefit of doubt to the skier but have seen lots of cases to close to call. The softer/smaller buoys make judging much more difficult. In the old days, fewer skiers would risk it with the size of the buoys, now we can plow through them....most of the time.