It definitely is a good wake up call. I always try to stand behind the plane before I run up the engine, but at one of my fields the flight line is basically besides the runway so from now on my plane will be pointed a better direction no matter how far I am away from people.

I only recovered about 2/3 of the pieces of the prop. The rest went into an alfalfa field. If any of those pointy sharp pieces would have hit someone they would have been going to the ER room for sure.