"Soarin" was first conceptualized in 1996 as "Ultra Flight," a name which can still be seen on the tower consoles of the California Adventure attraction. It was to feature an OMNIMAX screen with an inverted track allowing guests to fly over California's landmarks. The attraction would have three load levels and the system would operate on a horizontal cable, much like a dry cleaner's rack. This plan was abandoned, however, when it was determined that the construction and labor costs for that design would be prohibitive. It seemed that "Soarin" wouldn't become a reality until engineer Mark Sumner developed a different idea for the ride vehicles, using an Erector Set and string to create a working model. This design would allow Disney to efficiently load guests on one level instead of three, thus cutting construction and labor costs greatly.