OK, I’ll put this out there! 
On my second day of driving my 26t MAN with rear steer (2nd week of Class C driving), I found myself (due to a road closure at the front of my drop) having to go around the back to make the drop, in an area signposted as “Unsuitable for HGV’s”. Luckily I had a rough idea of what I was going to face, and thought I should just about be able to get in and out without too much problem. So I made the drop and then attempted to turn the truck around, which wasn’t the easiest thing to do, as a car had blocked the easiest escape route out!
And the alternative I was faced with, was to reverse into the entrance way of a tiny little Royal Mail depot. So I reversed in, while having a bit of an argument with some branches of a nearby tree, shunted once or twice, and thought right, one last hard turn as late as possible and I’ll be home free! 
But what I hadn’t accounted for, was how much tail swing my new truck had with it’s rear steer! And as I completed my turn thinking I was well clear of the gate, I heard a huge crash behind me!
And while I didn’t want to look behind me, I knew I had no choice!
So when I eventually manned up and took a look, I saw the huge heavy steel gate laying on the floor behind my truck! 
It turns out that the face of the gate wasn’t completely flat, and I’d caught the latch part right at the end of the gate, in the rear channel of my truck. Resulting it pinging the gate, and making it jump off it’s pins/hinges! 
As you can imagine, the thundering loud clanging sound of a 200+ kg steel gate hitting the deck alerted Royal Mail’s staff that something was afoot, and out they came shaking their heads and scowling at me in unison! 
After a little conversation & my details being provided (although there was no damage), 3 of us attempted to pick the gate up. Believe me, that was a struggle, and the best we could do was to lean it against the wall, and had no chance whatsoever of lifting it back onto its pins.
Before I left, I was told that this wasn’t the first time this had happened, and probably wouldn’t be the last…
As for me, I learnt an important lesson about the rear steer and tail swing of my truck, and since that incident I’ve not touched anything with it. And long may that continue… 
So yes mate, we all make mistakes, just don’t make the same one twice…