Disneyland may have lost the "happiest place on earth" moniker for some children, after a group happened upon the decapitated remains of a robot mid-ride.

Halfway through the Florida park's "Little Mermaid Ariel's Undersea Adventure" attraction, several children discovered the Ursula robot with her head grotesquely hanging off.

Video shot from inside the ride shows the robot continuing to speak and sing as normal, while children say "it's broken" in the background.