Continue play or not?

[simpson]

I understand that clocks have a tenths of a second on them. I'm curious how a BJ knows what tenth of a second the clock SHOULD have stopped on. Go back and read the original post. The BJ claimed the clock should have stopped at 1.5 but continued running to 0. That BJ, either has better eyesight than I do or just made up the .5. I understand when you stop a clock, the .5 or .9 is easily identifiable. How do you know what tenth of a second the clock should have stopped on if it keeps running?