Haunted Mansion is too scary for my kids. We tried it our last visit.
When the room stretched they started to get uncomfortable. But when the voice said, "There's NO turning back now..." that was it for them.
They said, "Mommy, can we turn back now?" so we left instead of getting in the car.
Now, every time we go somewhere in the car, they joke back in forth in the back seat..."There's NO turning back now..." "There IS turning back now!" "NO turning back" "YES turning back" "NO" "I'm turning baaacckkk." "Get BACK Here!" Then they laugh like crazy.
Kids are funny.