In the past 15 years of hanging this has happened to me on two occasions. # 1
WalMart poly webbing double ring set up broke right on the compression point of the rings. #2 Hennesey suspension rope broke right at the connection point on the foot end, in a downpour. Ended up in the truck for the balance of the night. If I had been backpacking on that trip I would have had to do some scrambling to recover as the rain had formed quite a puddle that I went into. Totally soaked,but managed to keep the down mostly dry. It broke under the cover so there was no way to check it ahead of time. Now hang on 7/64 Amsteel whoopies and MSH.