During golf tryouts in High school, everyone would go up to the first tee and watch as the guys tee'd off.
One of the kids was standing off to the left, about 15yds... He wasn't even on the tee box, but he was far enough ahead of the kid teeing off that when he tee'd off - and pulled it severely to the left, that the ball hit the kid standing on the left in the throat. I'll never forget it, because he immediately dropped to the ground and grabbed his throat. We didn't know if he could breathe or what the issue was... But it was just the shock of being hit, and the pain of getting nailed in that area that had him down on the ground. It left a huge welt on his neck/throat area.
The good thing was the kid who hit the shot only made a glancing blow on the ball - nearly missed it, so the tee shot didn't have enough velocity to do major damage.
A second story dates back to when I worked on a local golf course. In order to speed play, we had a few holes on the course where they would send us out to fore caddie. One was a par 5, which had a large marsh area which crossed the middle of the fairway and came into play on your second shot. There was also a stream that ran through the property and dumped off into that marsh area. One guy would be on the tee with a walkie talkie, and communicate down to the fore caddie in the fairway when tee shots were being hit from the elevated tee. The fore caddie down in the fairway would be off in the rough looking for the balls that landed. Then get the yardage so that when the players pulled up, they didn't waste time looking for their ball, and trying to get yardages.
So one day, I was working the fore caddie spot down in the rough off to the left... And a foursome of ladies were hitting their 2nd shot which had a forced carry - or you needed to lay up. They laid up behind the marsh, which left them with approximately 80yd shot into the green for their 3rd. They went down to their ball with the cart, and hit their 3rd shot. There are foot bridges that walk across the marsh and stream area, but you can't drive a cart over these foot bridges. There are signs that clearly mark that... The cart path is back on the right side - and you have to drive back to the right to get up to the green side with a cart. Well the ladies didn't pay attention and drove the cart onto the foot bridge (which is narrow - not wide enough to drive a cart over!). They made it about 3 yards onto the bridge before the cart crashed into the marsh. I didn't even have a chance to yell at them to stop before the cart slipped off the foot bridge. Thankfully the ladies were not seriously injured, just bumps and bruised. And shaken up... We had to get a tractor out on the course to pull the cart out of the marsh/stream inlet which was about a 6ft drop.