He told an emergency room physician he had a liking for raw fish – specifically, salmon sashimi. It’s what the 30-year-old man, from Fresno, California, suspected had landed him in the bathroom with stomach cramps and bloody diarrhea. But what he did not anticipate was the moment he spotted something hanging from his rear end, and he naturally assumed the worst. “He was like, ‘Oh my goodness, my guts are coming out from me,’ ” said Kenny Banh, the emergency physician at the University of California at San Francisco, in Fresno, who treated him.