I don't think I was ever terribly fond of elevators, but last year I had a really bad experience in one that has left me rather anxious about using them in the future. I was flying alone to another country for my work. I was supposed to meet up with another co-worker in the airport, but she was on a different flight that ended up being canceled due to weather. Unfortunately, as I was in the air, it also became clear that I was coming down with some kind of fever. Anyway, I managed to wrestle two giant trunks of equipment into a cab and I got to the hotel. I was thinking I'd just drop the stuff off, have a bite to eat, and go to sleep. Because my room was on the 7th floor, and my bags were so large, I opted to take the elevator. Well, wouldn't you know, it was one of those tiny ones with room for maybe two people standing. I hauled the trunks in, closed the door, and pressed my floor. I had been going up for maybe 20 seconds when all of a sudden everything went dark, and to my horror, I felt the elevator begin to free-fall under my feet for about one second before a catch latched in and I stopped. I was still in the dark, but wasn't falling anymore. I'm not sure how long I was like that, because my cell phone was dead and all of the emergency buttons on the elevator weren't working. Every now and again I'd hear faint voices outside so I tried to yell for help in Spanish (since this was a Spanish speaking country), but no one responded that I could tell. Every now and then the lights would come back on, the elevator would go up a bit more, then they'd go out again and I would plummet a few more feet in the dark. Finally, I had fallen all the way back to the ground floor, because I could hear the sounds of the lobby. I forced the doors open and got free. Apparently the construction work next door had accidentally hit a power line to the building, and that's why there was intermittent power. I ended up lugging the trunks up 7 stories by hand with a fever over going into that elevator again.
That was about a year ago. Since then I have trouble entering small or old elevators. When I do, it's really hard to resist jumping at every little bump, or bracing for a fall when it dips a little. I don't know if this qualifies as elevator PTSD, but I hope it goes away.