Shucks, she must've thought she was having a salad
My first instructor once had a student who just spaced out at 110 feet. She closed her eyes, curled up, and seemingly went to sleep. Her breathing was even enough.
He said he kept the reg in her mouth as he finned up with her. He was relieved to see her open her eyes in a minute or so.
She later told him she had been dreaming that she was back in her bed at the resort.