OK, I've got one. This past semester, I invited my out-of-state boyfriend to our Fall Formal, and he was thrilled about going. He was having a friend drive him down (because he's an international student who has no car) and everything was all sorted, so I spent all evening getting ready. He was supposed to pick me up at 7:30, but when he was a little late I didn't worry because I knew the drive was a couple hours long and a few minutes wasn't going to make a big difference. Then at 8 o'clock, I get a phone call: my boyfriend couldn't make it because the guy who was to drive him down got in trouble and was forbidden to take the car. He said he'd been trying for hours to find someone else to give him a ride, but everyone had refused. I know it wasn't really his fault, but I was really upset because I had been looking forward to it all semester and I looked really nice, if I do say so myself. I cried and cried and cried...for two and a half hours, to be exact. Knowing that he was sitting in his dorm room all dressed up but with no ride frustrated me more than anything! But my roommate was absolutely awesome--she hadn't been planning to go to formal, but as soon as she heard what happened she ran down the hall to borrow a dress so that I wouldn't have to go alone.
So now I joke that even though Cinderella had to go to the ball without her prince, she still had a (nice) sister to keep her company!