Did I kick this

[Jurassic Referee]

Originally Posted by bob jenkins

No, it doesn't. If the clock displays tenths of seconds, it's eminently feasible to turn the clock on and then off without the "seconds" part of the display changing. The same is true if the clock doesn't display tenths of seconds.

True, but if the clock is turned off immediately at the whistle on this play, simple reaction time by the timer means that the horn might go off. And, as per the OP, the horn did go off. We also don't have any info at all re: the time lag between the sounding of the whistle and the horn going off. That lag could be anywhere between 0.1 seconds and 1.0 seconds(or more) also. When the timer turned the clock off, there might have actually been only 1/10 of a second left, but the clock would still show 1.0 seconds if the official was looking directly at it. You also can't be sure when there are no tenths on the clock that the original time showing on the clock was actually 1.0 seconds or 1.9 seconds. If it was 1.0 seconds, then re-setting the clock to 1.0 seconds will not account for any of the time used during the throw-in. That was my point.

Imo, the only way that you could possibly have "definite knowledge" to re-set the clock on this play was if the clock was calibrated in tenths of a second and you were sure that the clock was started and stopped by rule.