I too have a fear of escalators. When my children were young we either held them or when they were too big for that we held their hands and helped them on and off because a little foot can get caught if it's not in the right spot. That sounds like an accident that could happen on any escalator. The MOST important thing in this whole thread is that the child wasn't hurt. A shoe can be replaced. I think the CM did what she could. Wanted the child to have shoes, the kind that are available at WDW.