When my younger brother was in primary school, he used to have a lot of stomach aches, and it usually turned out he was lying. Anyway, once he was about to go to school but said he had a really bad stomach, then he ran upstairs and proceeded to unload the runnyest crap you ever seen (he shouted me in to see). My mother said that he can go to school, he should be fine now. So much for that. He was in school for about an hour, and told his teacher he felt very sick, so he was proptly sent to the medical room. He got there, and chucked up all over the floor. After this he shit his pants, again, with the runnyest crap you would ever see. It filled his underpants, travelled down his leg, and made a mess of his socks and shoes. Luckily for him this was in year 3 when nobody could remember.
Also, another story about him. When we was at holiday (good old butlins), we all went to bed after a long night. It was only in the morning that I was woken by my mother screaming. Here is a quote from my brother:
"I needed a crap when we got back, but dad was in the toilet so I just went to bed. But I got up in the middle of the night, ran to the toilet, put my hand on the doorknob, farted, and shit my pants." His pants were filled, I seen them. They were so bad my mother put them in a plastic carrier bag and we had to put them in a nearby dumpster.
I really think he has bowel problems.