These stories are so entertaining! Sorry, I know that's a horrible thing to say about people's misfortunes. But it's just, Disney... all the planning, all the build-up-- it's like those wedding disaster shows, you cringe in empathy but you just can't look away.
I really had to rack my brains to think of a BAD Disney experience. All my childhood memories are of fun fun fun, and my two trips to date as an adult have also been awesome. Theme parks and me, we rarely have a bad day together.
But I thought of something. When I was around, hmm likely eight years old, and my sister was six, we were staying off-property in a condo with my parents, and also my aunt and uncle and older cousins. They decided to do something else one day, and my parents did too I guess, so my older and very sweet and patient aunt took my sister and I to Magic Kingdom.
The first thing that happened that day was my sister wandered off during the parade. I remember I was pretty upset that we wasted valuable Disney time looking for her! She told me later that her ghost dog had led her away (remember those stiff leashes with harnesses you could buy in front of the Haunted Mansion? We both had a "ghost dog"). THEN, insult to injuries, my aunt could see that we had been excited by this little adventure, and decided we would go back to the hotel for a pool break!
I have a pool at home. This was the WORST news I had ever heard. I grumped all the way out of the parks, as we took the tram to our lot. I finally did it-- I threw a tantrum. I stormed away from my aunt and sister.
She, being an incredibly patient person, had not gotten angry or engaged with me. There were some bushes by the tram. She thought I was sulkin behind them.
But I wasn't. I got back on the tram.
This would have worked out GREAT-- if I knew anything about the Disney tram system. But I did not. Or maybe the driver saw through my clever ruse, because I went on what I call the "Disney Parking Lot Tour". We went and stopped at EVERY lot in that place. I remember dwarves, chip and dale, several characters. It was probably not longer than ten minutes but I remember it felt like I had been on that tram all day. Finally the tram stopped-- at the parking lot ACROSS from where I had gotten on.
I meekly slid off the bench seat, walked back to my aunt, and allowed her to take me back to the hotel for a break without further incident.
What still gets me today is that I was SO CLOSE-- if I had just stuck on that tram I would have been back at the monorail. But I wasn't taking a chance of more parking lot sightseeing.

That was the end of my thwarted Disney adventure.
This is also known in our family as the trip where my Aunt lost both of us at Disney World.