From magazine

Hoover was famous performer at air shows, when he was flying at 300ft, both the engine suddenly stopped. He managed to land.

He suspected about the airplane fuel , the ww2 propeller plane fueled with jet fuel instead of gasoline.

The young man was sick with agony of his mistake. Tears streamed down his face as bob approached

You can imagine Hoover's anger. But Hoover didn't scold the mechanic, he didn't even criticize him. Instead, he put his big arm around the man's shoulder and said,

“To show you I'm sure that you'll never do this again, I want you to service ...