What was supposed to be a fun-filled vacation for Chelsey Bishop turned into a humiliating nightmare. Chelsey Bishop wanted to ride the "Revenge of the Mummy" roller coaster at Universal Studios in Orlando, Florida. But after boarding she realized she couldn’t fit on the ride. “I was too big for the harness to latch,” she told reporters from Inside Edition. “So I had to unboard in front of everybody and it was mortifying.” That was two years ago, but after going on a version of the famous Keto diet, she says she went from 340 pounds and a size 28 to a size 12. She cut out sugar and carbs, loaded up on protein, and now she's ready to ride all the roller coasters she can!