Unfortunately, I can't remember any of the ones that I've forgotten about.
Maybe I'm taking the thread title a bit too literally.
I can however remember at the age of 18 being stuck at the side of the main road into Mt Gambier from Adelaide after pulling over to find a tree big enough to stand behind. Got hopelessly bogged instantly because the long grass hid the muddy ground underneath. The mate and I decided that because we couldn't move, the best way to cope with the situation was to drink a cartoon of beer between us.
When the police pulled up behind us a few hours later, it was difficult to convince them about our circumstances. Eventually, they saw the funny side and took us the last 10km into Gambier. Next day, got the car towed out and all was good.
I still regret not taking a bag of doughnuts to the station the next day.