Boy hurt on Peoplemover

[Mommy2allgirls]

Friday my family and I were at magic kingdom and were waking to get on people mover but it was closed with a lot of cm's blocking it and management coming out. We heard a boy screaming and after a few minutes a EMT arrived with a stretcher and as they were moving the boys arm he would scream loudly they escorted him away from the ride and to backstage. His arm looked pretty messed up.

I was just curious if anyone knew how he got hurt on the people mover. It was all so sad and surreal. People mover was then closed down.
Was anyone else there and know what happened more? I'm worried about this poor boy I saw the pain in his eyes and it broke my heart. I hope his injuries aren't too serious. Praying for the family