I once threw a drive on Seatac #15 with a new Pro Boss. It 'tombstoned' into the hill just left of the rise. I went to pull it out and it would not come out. I pulled even harder and finally I got it out, along with the gnarled piece of metal that it had impaled itself upon. The disc had a cut very similar to the one in the picture.
"I love it when a plan comes together" -John 'Hannibal' Smith