Maelstrom was a reversing Shoot the Chute dark ride attraction located in the Epcot theme park at Walt Disney World Resort in Florida.
Designed by Walt Disney Imagineering, the ride opened on July 5, 1988, in the Norway Pavilion of the park's World Showcase section.
The trolls, angered by the trespassing boat, cast a spell onto riders as the vehicle began to move backward rapidly, accelerated by hidden conveyor belts underneath the water's surface.
The boats floated briskly past scenes of Atlantic puffins, polar bears and living trees, before coming to a stop on the edge of another waterfall, exposing the Norway pavilion's main thoroughfare.
After passing very close to an oil rig, the ride came to an abrupt end in a calm harbor of a small village, where the narrator announced, "Norway's spirit has always been, and will always be adventure."