A guy had a bum leg, fell down and his truck rolled into the lake. All we saw was the splash while in the boat. The truck had momentum and floated way out 125' from shore but it was floating great! I told the wife to hang on because I thought I may need to rescue occupants. It was empty so while the wife held on to the truck bed I reversed throttle and pulled it back to shore. Another guy swam to help so I had him tie my favorite dock line to the truck. I brought the rope to shore and told everybody to pull. Typical 25 spectators in the way with about 3 of us helping. At least I had it against the shore. Old guy pulls up with winch so I fetched the cable. I said find a good place for the cable. Big mistake. With a bunch of guys in the water I handed off the cable and all they did was hook it to the bottom of the sheet metal bumper. I could not get them to stand back but luckily knobody was hurt when the bumper bent, the cable flew and the truck shot back into the lake and sunk way deeper than I could swim down to. I tried. I wanted my dock line back. I guess just know a newer vehicle floats a long time and just because 25 are around and you take the lead you still have to watch every move. Lesson learned...Again.