"After about 15 seconds of being upside down, I realized we were stuck. I thought we were going to die there," Jordan Harding, 18, tells PEOPLE Charna Flam is a writer-reporter at PEOPLE.

Illusions are fascinating because of what they reveal about how our brain works. This particular one, demonstrated to a Women's Institute meeting for Bang Goes The Theory, involves your perception ...

He reported hearing people exclaiming "Oh my God, they are upside down," as it became apparent that the ride was stuck. READ MORE: Baby girl, 8 months, missing as family face abandonment charges ...