After a heavy-weather sail, I came back the next day to the marina to find a backstay lying on the boat. Since the wind was still strong, I was terrified that I would get dismasted.
Thankfully, the mast was stabilized thanks to the good habit of tying the halyards as if they were stays.
It took quite a lot of time and money to get it fixed, you can read about it in my later posts labeled Lil Walkabout.