Unbelievable stuff.
I saw a thing the other week about a bloke who swallowed a small marble when he was a kid and forgot about it, assuming that it had come out in a big poo at some point in the subsequent days. 25 years later, he was at a health farm with his wife and had a colonic irrigation. Out pops the marble, followed by about 3 pounds of 25 year old rotting faeces. Delightful. On the same programme, there was a woman who had become a vegetarian in 1992 who went for a colonic last year and out came a huge piece of unchewed meat (again followed by a kilo or so of very old shite).