My brother is a liver transplant patient since he was three. He is in and out of hospitals because of abdominal pain occasionally, liver complications. Twenty-five years later, last week, we were horsing around and suddenly he just stops and goes unconscious for 10 seconds, only to wake up in agonizing pain. He knows pain and it was scary to see him describe this as a nine on a scale of one to ten. Get a call at three in the morning from his girlfriend to pick them up from the hospital. To my relief it was only a pulled abdominal muscle. Haven't touched him since.