This case needs a few more facts before I can impose my ruling
From what I have, I don't see this as a clear-cut case of anything. If I accidentally stepped in the hole between the gondola and the deck, yeah, my fault. But if I screamed "stop the gondola" for 10 seconds, while the attendants ignored my cries for help, and my tibia snapped, then I'd see a negilgence issue.
I was taking a class up our high-speed detachable quad a few years ago, on a very crowded day. Someone, 2 groups in front, who was loading the chair, got tangled up with his chair mates, and fell forward when the chair hit the back of his legs. This was an average, middle-aged man. Not incompetant by any means. At the time, all three of the lifties working the base of the lift, were in the lift shack, and not paying attention as I was yelling at them to stop the lift (you could watch the whole situation develop, and it was obvious what was about to happen, then did happen). finally, in one motion, I dove for the red button with one hand while swinging my pole toward the shack door to get their attention. remember, this is a detach, which moves very slowly in the house. They had a lot of time to react and never did until after I stopped the chair. Had the chair moved another foot or two, the guy would have fallen off the loading ramp (all of a foot or so), as this chair, which rides very low to the ground dragged him along.
So, sure, there are some inherant dangers, but there is also some responsibility for lifties to do their job, which is to help load people safely on the lift and to pay attention to what's going on. Luckliy, this guy didn't get hurt, so their was no law suit, but had he been hurt, I could have seen some validity to a suit.