A spellbound hush fell over Casa Bonita’s lunch crowd as 20-year-old Georgia Pullis, one of the restaurant’s cliff divers, took her place at the rocky ledge over the iconic 30-foot waterfall. Dressed in a striped swimsuit with water dripping down her back, Pullis took a deep breath before she launched into a graceful layout back somersault dive. She surfaced to the delighted cheers of the guests. As Pullis climbed out of the pool, diners went back to their burritos and tacos. But they had just witnessed something remarkable. Casa Bonita, the only Mexican restaurant where you can stuff your face...