I once backed the boat into the water and as I was getting out, I pushed the door lock with my elbow. Being on the incline the door shut while the engine was running. My wife was already out and had locked her door. The nearest phone was up the hill and a mile away. There I am, the boat and trailer in the water, truck running, and nowhere to go. There's nothing in the boat to get into the truck with. Fortunately a guy pulls up and has a flathead screwdriver. I found out just how easy it is to get into a sliding rear window. I now always roll my window down before I launch. 