*been there done that* chains can and will whip just like ropes and cables.
i have a dent in back of the s10 blazer back door from a chain breaking and wipping back into it. when i tried to pull out some bushes.
555c TLB, a few weeks back, trying to pull a root ball of a tree up and out of a creak area. snapped the only thing that saved me, was i hooked off to edge on FEL, and pulled at an angle. if i was pull straight back, i would most likely not be here typing this up. that chain wipped back in some waving effects.
over the winter. i need to get the trailer out, so i hand dug around tires, and worked my way to the front with the 555c TLB clearing the 2 to 6 feet snow dirfts. got things what i though was cleared. hooked s10 blazer up to it. and got it stuck. ran short chain between tow hook on blazer to hook on top of bucket of the 555c TLB, chain poped, thankfully it snapped near blazer and chain all snapped back into bucket. if it snapped near hook on the bucket. i would most likely would of needed a new windshield. and had a few dents in the hood to fix on the S10 blazer.
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not chain related, but rope and cable.
setup a small drag harrow to pull across a lake to remove most of the moss. using long heavier duty nylon rope. i would assume approx 300 feet of total rope. made from 3 or 5 individual ropes. i would always put a smaller size rope near back of s-10 blazer. so if it would snap, hopefully the smaller lighter duty rope would snap first. a couple times it did, but once it broke near drag harrow. 300 foot of stretched rope, is no funny matter. thankfully i pulled at an angle like i normally do, and it all just whipped pass rear end of the s10 blazer.
a few years back using nylon rope to pull some bushes. rope got cut by a branch and came whipping up pass side rear view mirrors. ((thanking my lucky stars i didn't have my head out of the window.))
trying to pull some large branches and logs up out of the woods were i would not even dare to drive tractor down into. whipping of that cable was enough to say ok, time to pickup things and forget about those branches for good. the cable snapped through a 2+" other branch on other tree and still had plenty of force to take out me or another branch if it wanted to.
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just when you think you are well below the load strength of the chain/cable/rope. you normally are, but something happens. and that is when things can go quickly wrong.
the oh POO factor normally hits me when i get in the driver seat, when i am about to pull something, which makes me double think and then get back out and double check everything one more time. and make sure i can pull at an angle vs direction chain/cable/rope is hooked up to. so if it does snap. it will be less likely flying directly back into me.