Yeah, some thing like that happened to me yesterday when fishing. I was using my worm rod (pretty stiff rod) and braid, also I had a 15lb flouro leader, and a mustad UP worm hook. I was fishing around a sunken tree and a culvert, I felt a tick-tick, let her swim off with it for 5 seconds or so, set the hook on her, the bowed over so much I though it was gonna break, a few seconds later she broke off, I reeled in the line and found that the leader had fray. I've never had any flouro try as bad as this it was triple fish flouro. So just be warned, don't use it, it may cost you a big like it did me! :-[