Being an umpire is dangerous, particularly calling a game from behind home plate where you are subject to wild pitches and foul balls coming at you at high speeds. This poor umpire in Korea was reminded of those dangers earlier this week when he took a direct hit to the jewels, for lack of a better term, off of a foul ball.
This wasn't just a foul ball that bounces up and clips him, he takes a shot clean off the bat and goes down. He would have to be carted off the field and replaced.
Hopefully he's doing okay now, but that's one of the more painful things you'll ever see happen to someone on the baseball field.