A friend of mine almost lost his ankle when he fell off the back of the jetski. The line wrapped up around it and then jerked. Out of sheer dumb luck, the rope broke and he just wound up with a permanent ankle bracelet (he has a purple scar circling his ankle). He said it burned through everything rather than crushing it's way through. But it didn't get any ligaments, just a bunch of the tissue around the outside.
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