What was your worst school trip?

Well. I was home educated through primary and secondary school, and took plenty of trips to museums, etc during that time, but those don't really count. My only real school trip-esque experience happened when I was in college. It was the spring term of 2022, and my college had announced a department trip to London Comicon for my department. I was excited, at the time - I go to Comicon every year anyway, but it was free transport and I would get to go with my friends. We had to buy our own tickets, but we were all fine with that. Not a big deal. The day rolls around. We had been told to gather at a certain point on the college grounds at 9AM, where the coaches would leave promptly at 9:30 for an 11AM arrival time. It was a fucking scorching hot day, something like 30C outside, or close to it. The area they had instructed us to meet at had no shade. This was just the start of the problems. The next problem was that we were not being allowed to board the coaches. Nobody was explaining what was going on. Several people got heat sickness in the meantime. 9:30 came, then 10, then 10:30. We'd been waiting in the direct sun for an hour and a half, several people were quickly getting sick, and we were now a full hour late for the con. There was no seating. We had to either stand, or sit on the pavement. We had bought our own tickets. We had paid for this nightmare. Finally, an explanation comes - not only were there not enough seats on the coaches they'd hired for all the people who had signed up for the trip, but a good portion of the people going on the trip didn't have the correct paperwork to board the coach in the first place, because several teachers hadn't handed out the right paperwork - two forms were necessary, and several teachers had only handed out one. This included my class. We were not allowed to board the coach. It was at this point that I broke down into a full on crying, snotting fit, which was maybe not an incredible move given that I was horribly dehydrated at the time, but I was nauseous from the heat and I had been standing for around an hour and a half. I have arthritis. It wasn't diagnosed at the time, but the pain was still very much there. I was in hell. I had paid to be there. I demanded to leave, figuring that I could just get to the train station and take a train down to London and hopefully salvage the afternoon of the convention. I was 17 at the time, and the teachers in charge of the trip refused to let me leave since they had a legal duty of care over me. I was pissed at this point and texted my mum explaining the situation. She called me and explained to the teacher, over the phone, that I was allowed to leave if I wanted to and she would take legal responsibility if I got hurt or anything. It was at this point that an admin staff member finally came over to see what was going on. He asked how old I was. I said I was 17. He let me on the coach. I figured that it was probably easier for them to just let me go on the trip rather than let me go on my own and potentially have me get hurt and risk them being on the hook for anything legally. I was FINALLY on the coach at this point, but none of my friends were able to come. It was another half an hour in the blazing hot coach before we finally started moving. I cannot describe to you the genuine ecstasy in that coach the moment we started moving. We finally arrived at around 12:30PM, 1.5 hours after we had intended to arrive, but we didn't get into the venue until around 1PM. I'd missed everything I wanted to do, but I was confident that I could still salvage something from the trip. We were told to gather at a certain point for a headcount at around 4PM, so I went off and enjoyed myself for three joyous, joyous hours, before going for the headcount. It was not a headcount. We were told to do anything else that we wanted to do, go to the toilet and head back to the coach. We were going home. Everybody was fucking horrified - by our tickets, we still had another 2 hours at least. But no. We were supposed to be back at the college by 6:30pm. So, we went back to the coaches. All in all, a good chunk of the people who signed up to go couldn't go at all, everybody who turned up had to suffer in the blazing heat with no seating for around two hours, and we only got to be there for about half of the hours we had paid for. Oh yeah, and we paid for our own tickets. That was the first and last trip I ever went on at college.