Creating the seating:
Thought process: the seating vessel should be familiar and relevant, but not overpowering or take away from the attraction itself.
Psychology of vessel: ‘Falling’ creates a feeling of thrill, feeling fear or being scared; this ride should be comforting, reminiscent, memorable with a hint of thrill and excitement. The seating should cradle the audience, hold them in (similar to a boat). This creates a sense of comfort, motherhood, & safety (emotional and physical), and will also protect them with the small drops and speed of the ride in mind.
Examples: Pirates of the Caribbean, boat. Peter Pan, sail boat. Alice in Wonderland, caterpillar. Radiator Springs Racers, cars.
Conclusion: What would be more fitting for a Wiki Wiki Adventure than a rocket ship? Design references from the movie were used to make the seating relevant and charming.