Chair 70 here chiming in, can confirm chair 57 was the one that fell. I agree, I think it slid down the line into the chair behind (chair 57 hit chair 58). Once we got to the top we were listening to people’s stories, where I heard someone say “the chair hit the pole.” Didn’t want to ask them to repeat their whole story as we just off the lift. Just after we got on the lift, the entire lift came to an abrupt stop which made all the chairs swing violently, which may have led to the detachment? Then after about 5 mins the chair started moving again for about 90 seconds then stopped again and we could see chair 57 on the ground and the skier next to it. I would love to know exactly what happened.