A Spanish Fork girl was in stable condition, but her sister remained in critical condition Monday following a freak accident Wednesday.

Alyssa Garfield, 6, and Andrea Garfield, 10, were inside an inflated room where children jump on the trampoline-like floor. It was being used to promote Skipper's Seafood 'n Chowder House in Provo. At 6 p.m. Wednesday, strong winds picked the facility up and flung it over the roof of the restaurant, a Provo Police dispatcher said.Alyssa was in critical condition in Primary Children's Medical Center. She suffered serious head trauma, internal injuries and damage to her legs.

Andrea suffered abdominal and back injuries. Her condition has progressed from critical to stable, a Utah Valley Regional Medical Center spokeswoman said. She may need back surgery to correct some of the damage, a UVRMC spokesman said.