Slightly off topic, but..
Having played to a reasonable level, I was once asked to umpire a match between men when the real umpire didn't turn up.
It was the hardest thing I've ever had to do.
I can't think of anything else that requires countless snap decisions that get immediately judged by so many people.
It didn't help that the players were keen to throw a few punches at each other.
I was totally exhausted by the end, which couldn't come soon enough.
Yes, it's a long way from my little experience to the seasoned guys who umpire AFL games.
But I think I found out enough to know it's a thankless task.
And not helped I'm sure by the current rule adjustments within seasons.
Spot on