On Sunday, my 915 D3 got undone (the screw came completely loose). No worries though, because a quick twist of my wrench when I got home fixed it immediately :)
Talking about it with my playing partner, he said that he noticed a small 'creak' a few days before it came undone, and advised me not to tee the ball balancing myself with the club, shown on the pictures I included. Buddy told me he snap a shaft doing that.
Now that I'm self-conscious about how I hold the club while teeing up the ball, my questions is: Has this ever happened to you? Has a club become loose, or you broken a shaft like my buddy? To be honest, I still do it when i don't catch myself, lol ;)