There is a post on another board from the folks who were in the cabin that was crushed between two others. Interesting enough to quote:
from "Diz Bee" on another board (search for the first 3 letters in Disney)
"Ok... soooo... this is my wife and I last night...
View attachment 416474
Let me start by saying this was our first time on the gondola. We had tacos and a bottle of Prosecco to celebrate our inaugural ride at the Caribbean Beach quick service. We got on at the skyliner at the Caribbean and were on our way to EPCOT. When we arrived at the Rivera we came to a stop. The system was down for a while... 5 to 10 minutes. While it was down our doors were open and a cast member was doing a Disney trivia game with each car. Then the system came back on line, our doors shut, and we moved forward... the blue car in front of us was NOT moving, so we crushed up into it and the car behind us crushed into us and the car behind that hit them and so on... you could hear the metal into metal scraping and the breaking of the plexiglass vents. The accident didn’t last long... but I remember sitting there and saying to my wife “I don’t think that was supposed to happen...” Security started going around asking if everyone was OK. A maintenance guy came over with a giant pole type tool, like a overgrown hanger pole they use at clothes stores to get up high. He did some jockeying of the blue car in front and we were freed up. The car swung around pretty hard and the noise was pretty harsh. My wife screamed. We noticed our doors were bent and weren’t shut all he way. There was definitely body damage to our car and several others, including broken vents. We were lucky that we were at the Rivera turnstile because our evacuation was swift! I don’t think we realized the extent of the accident until we saw pictures of our car on the news. So that being said the cars are pretty tough. I think it could of been worse, and we’re very lucky it wasn’t. Cast members were very calm and super nice. They offered us transportation, but we decided to walk back to our car. "
Followed up with
"I would like to add.. that the odds are so low that this would happen. I mean we can’t win the lottery! My wife and I have been talking about it all morning, it’s very bizarre. The weird thing is... is OUR car was the car that was crushed... the first car before the blue car that failed. Yet after they fixed the placements of the cars and we evacuated... no one from Disney approached us and all. Disney management doesn’t know we even exist... it kinda odd. Here we are watching videos from the local news and YouTube and we keep hearing “no one knows if the crushed cars had people inside”. Well we’re fine over here... thanks for asking!!!!
Even though we were in the accident, at least we weren’t stuck in the air! Hope everyone was ok!"
FWIW All the cars in that photo had people in them when it happened, and all got off there.