The aliens in the dome behind the wheel were first shocked, then hysterical with laughter. Earth people could NOT resist colored lights, music, and a brief thrill.
Time after time, they loaded up the Ferris wheel, laughing and screaming, never noticing when they were sucked out of their buckets into another dimension.
And those waiting in line for their own thrills never suspected that the people alighting from the wheel were only shadows of themselves, melting into air and water.
What was really sad, though, was that no one seemed to miss them.