I remember on one of my first lessons we parked up somewhere, my instructor pulled out his phone and showed me a picture of his last instructor car... A total write off after (IIRC) being in a collision with some woman at a junction who was on her phone and didn't see the traffic lights were on red.
Other memories include almost crashing into the side wall of a tunnel while too busy concentrating on changing gear and my absolutely abysmal parking after just coming back from my test. In my defence I'd never actually bay parked forwards before, I always did it reversing in.