I was playing my first round in advanced at the ND State Tournament this year. One person on my card had a friend playing in pro later that day, so the friend was tagging along watching. On one infamous hole, pictured below, the person on my card tossed his disc onto the beach below. The straggler friend of his offered to get it while the rest of us left the tee box to find our drives.
The instant after I left go of my next shot, I see a flash of color and feel the impact. My hat and glasses go to the ground as I drop to my knees. Apparently, the straggler friend decided to throw his buddy's disc back to him, despite the fact that the shot was completely blind. He assumed it was safe, since at least 2 people were at the cliff's edge above him, watching him do it. Regardless, those spectators/players watched the shot soar from start to finish, without yelling a fore. I was pissed.
The next few holes sucked. It really rocked my concentration getting smoked by a disc and feeling raging pissed. At least it was, from what I can assume, a big arcing shot and definitely not a line drive.
Needless to say, I told the guy to take a hike, don't throw blindly into people, and learn to call fore. Later, I saw a photo of him in DiscGolfer magazine #14, pg 14, for winning Collegiate. It's too bad common sense isn't a requirement for playing great golf, apparently.