Many years ago in the wilds of Iran.....landed at a village in an Alouette III.
As we were revving up to take off....from way back of the crowd came a rock thrown by a young Iranian lad.
There was divine intervention that day....as I sat there watching and unable to do anything but flinch...the rock hit the tip end of a rotor blade....and like a Babe Ruth home run over the center field fence.....it went right straight back and smote that rock chunker square on the forehead!
It whizzed by the crowd so fast they never even saw it....but it KO'd that dumbass like magic!
As we flying the police that day, we shut down and explained to them what happened.
They proceeded to discuss the matter with the young lad and added a few more knots and bruises in the process.
Yes....helicopter flying has its good days!