We can all thank Beth for sparing your child years of therapy. POC is Chock-Full-O-Skeletons.
The skeleton on BTMRR is a dinosaur that the train sort of passes under. The coaster is going faste enough and it happens so quickly it doesn't make such an impact if they're not expecting that. She may think "what was that..." but I don't think it's all that bad.
Maybe you can do a child-swap and whoever goes first can decide.