I used to launch my bass boat that way sometimes if the ramp was shallow, I was by myself (my favorite way to fish), and it was to cold to get wet. One time I showed up early for a tournament and proceeded to self launch. I watched my boat drift back its usual distance and then some, and then some more! Rope broke or came untied, can't remember witch. To make matters worse it was very foggy that morning. Just before it drifted out of sight another boat showed up and retrieved it for me. Talk about feeling small, I felt like I could of sat on a penny and dangled my legs
On another note, I figure conservatively I have backed a trailer well over a hundred thousand times and on some days I look like its my first time