Several years ago my son and I were going to launch his 20' Baha from a local ramp. The boat had a fair amount of water in the bilge from being parked out in the rain for several days with the plug in it. We were backed up on the ramp and my son's girlfriend was in the boat. The ramp which was almost flat (I thought) didn't seem to have enough incline to drain the bilge quickly with the plug out, so I decided to put the jack down a little to raise the bow of the boat to get the water flowing out of the bilge a little quicker. About the time I got the bow up pretty good, which also had the back of the truck up pretty good as well, the ball lock apparently hadn't locked and the trailer came off the ball and in the river goes the boat and the trailer and the tide is going out fast. I manage to throw a rope on the trailer and get it tied to the dock, although it still went out and down about 20'. The boat seperated itself from the trailer and was heading downstream at a good clip with his then girlfriend in the boat with no plug in the bilge and she didn't know anything about operating a boat or anything else for that matter, but she was sitting up there looking real pretty. My son jumped on another boat and went to her rescue, got the boat back to the dock where we inserted the plug back into the bilge to stop that. While all this is going on, people are coming to the ramp and launching their boats over top the trailer that is submerged about 20' off the ramp. We manage to dive down to the trailer, following the rope that was tied to it and get a big rope around it, hook it to our truck and pull the trailer up out of the water, get hooked back up, and luckily live happily ever after. Anytime I tell my son he has done something stupid, he reminds me of that little trick that I pulled. I'll never live that one down.