Twenty Five years of doing this, and people still call that a goal. First, when the ball hits the bar, AR2 is not on the goal line, he is a good 5 yards in front of it, so from his angle (5 yards in front of the goal line) he may have well thought it was a good goal. However, that angle it is impossible to see it. This is why in the EUFA league they have officials standing right off the field but on the goal line. It is impossible for ANY AR no matter what skill level they are at to 100% be sure that the ball completely went over the goal line.

Second, when a ball hits the top cross bar it has not completely gone over, backspin must propel the entire ball, not part of it, over the goal line. If any part of that ball hits the goal line, it is not a goal. The width of the goal line should be the same as the width of the goal posts, since the ball must travel beyond the posts it must therefore completely travel beyond the goal line, which the picture shows it didn't.

Bottom line is, the AR never made it down to the goal line, therefore it is impossible for him to be 100% sure that it went in, that isn't his fault since it is impossible to run that fast. What was his fault was calling it a goal without being 100% sure and being right there. Tough loss.