Demasted.
A couple months back a bad storm bringing south winds of almost 60 knots generated 3+ foot waves which is a bad direction for Willoughby Harbor Marina. A loose piling was moving 3 feet pulled by my boat being tossed like a cork. The next day my wind indicator was bent and I was told that my mast had contacted my neighbors. A couple weeks ago I had the wind indicator replaced and the mast rigging inspected for damage. None was visible. Apparently there was hidden damage. Sailing home the following day was a little breezy with a SW wind of 15-20 knots. Sailing close hauled, there was a loud bang and everything came crashing down. Fortunately, I was sitting on the windward side or I would have been seriously injured or killed. I immediately dropped anchor. I worked for a few hours bouncing up and down in the waves with both the wind and current complicating things before I finally decided there would be no saving the sails or the boom and let it all go.
Returning to Willoughby, mastless, I was told by another marina customer that my mast was actually entangled with the boat next to me that night. Something was overstressed leading to this failure.