Most clocks, and shot clocks, that I've seen click down a second immediately. Think about when you see the clocks that read the tenths or hundreds of seconds. Does the clock read 1.3 seconds when there is only 0.3 seconds left? Or does it read 0.3? The shot clock will read 30 immediately when it is reset, one tenth or hundredth (depending on the set up) after that it clicks to 29. So to have a ten second call using the shot clock. It actually needs to be the tenth of second before it clicks to 19, Basically it needs to have said 20 seconds for 9 tenths of a second while it reads 20. Why it seems like there is a delay for the horn when the shot clock reads 0. It still has 9 tenths to go.
So with that knowledge, it was not a 10 second violation. So Fran got booted for being a moron and not knowing how clocks work.
