Years ago I was playing a par 4 at our club with a pond in front of the green. I hit one of the best drives of my life and just had a sand wedge into the green, and dumped the approach into the pond. I walked up and dropped another ball short of the pond and promptly dumped another ball into the water. As I watched the ball (and a large divot) fly into the pond, I just let go of the club on my follow through and drowned my sand wedge.
They actually found it years later while dredging the pond. My name tag on the shaft was still intact.