I have had no bad jerky experiences (thank god, it's my only true food treat), but I've had a bag of chips have a silverfish run out of it, and another bag of chips have a band-aid in it :/
I ate a moldy cream puff once. It was absolutely horrific. From the outside it looked fine, but when I stuck the whole thing in my mouth and took a big bite into the cream, it was by far the worst thing I've ever tasted. The taste actually stayed in my mouth for about 24 hours despite repeated brushing, mints and eating other foods. Not a good experience.
the only time i was mildly worried from eating / drinking something was when i was 17, working in the bush, and syphoning fuel (a daily chore...) i swallowed a mouthful of diesel. yuk.
the only real thing that happened was everything tasted and smelled like diesel for 2 days, not sure why i was worried aboot it.