My son was injured on Rock and Roller coaster at the Studios. He was getting on, and the CM said, "watch your hand!" My son, said, "What?" and the CM slammed the the upper restraint thing down on his hand. (I was annoyed he did not WAIT for my son to move his hand.) I know normally, one pulls it down yourself, but for some reason my son was confused, and the CM was walking down the line and pushed it down on his hand.
We had to go to the walk in place for an Xray the next day, which was negative, so it was just swollen and sore.
We did not report it, because DS did not really complain about it until later that day. Typical kid, lol.