[Rockingham]

As a young boy, one of my brothers did that experiment many times, using pennies.

[scrabblehack]

This story was in the Guinness Book of World Records for years:

http://documents.adventistarchives.org/Periodicals/RH/RH19660217-V143-07.pdf

They gave him a careful checkup, then—believe it or not—recovered 258 objects from his stomach. Included in the items were 26 keys, 39 nail files, three sets of rosary beads, 16 religious medals, one bracelet, one necklace, three metal chains, one beer-can opener, one knife blade, four nail clippers, three pairs of tweezers, and 88 assorted coins.

[AFPhys]

I did not rely on my sibling's digestive tract for my data. As a young budding scientist, I did my own research with pennies. My FART score was 2½ days.