Had one earlier this week while playing Erin Hills. I had a lie where the ball was on top of the bunker and my stance was below it on a steep, rugged bunker bank. Took my stance, swung and hit the shot, and lost my balance, chest/face planting into the bank so hard I was temporarily winded. Other than tweaking my back a few times on a golf shot, I had never actually hurt myself swinging a golf club.