I went yesterday to do a little shore daytime flathead fishing. I started at the colorado river spoting logs and dropping a live talapia as close to them as possible. No action there. I went to a backwater next to where I was that I know has a very large tree stump with roots and all that the Fish and Game dumped in the water. I put a talapia on both sides of it and got no action. There was a stump all the way on the other side and I had a lighter pole with spincast and brand new 25 pd mono so I though maybe I could reach it. Sure enough I launched all the way over... bout 30 yards and landed right next to it. It took about 10 minutes then I had a good tug and everything went slack.I reeled in my slack and it kept coming he swam all the way across the backwater right at me. When it tightened up some I set the hook and it was on. I got him up with my heart thumpin into the tules right in front of me he looked app 30 pds and that was when my tried and true knot decided to pop! He landed in the mud and launched right back where he came from. I managed to find a nice large flathead willing to bite in the daytime and I lost him. I made several unmanly sounds and went and sat in the van. No more action that day either. That is the first time I've ever had a knot break like that. I wont be using that knot again.