Looks like some people took the banana advice too seriously.
Just read this snippet on BBC:
An Indian suspect was forced by police to eat 50 bananas as a laxative, to retrieve a necklace he was accused of stealing and swallowing.
Police say he snatched a gold necklace worth £550 ($1,100) from a woman as she shopped for toys on Saturday.
When cornered by police, he swallowed the necklace.
The suspect was fed 50 bananas on doctor’s advice, after the X-ray dealt a blow to his denials.
Considering the average weight of a medium banana to be 125 grams, this guy was force-fed 6.25 kilograms (13.77 pounds) of bananas!
OK, I understand that bananas are rich in fiber and facilitate smooth bowel movements, but come on - 13 pounds in one sitting! That has got diahrrea written all over it - not smooth bowel movement.