I had a strange experience with, of all things, Planter's Dry Roasted Peanuts (a common thing in the U.S.). I had bought a jar to munch on but a few hours after I'd had my first handful I got pretty bad diarrhea. I didn't associate it with the peanuts but a few days later when I had another handful the same thing happened. I still couldn't believe it was due to the peanuts, but I hadn't had anything else that day that was remotely unusual so I kind of laid off them for a couple weeks.

Then one night before bedtime I was really hurting for a snack and I just couldn't believe a jar of dry-roasted peanuts could really cause food poisoning so I had a couple more handfuls. Woke up in the middle of the night the sickest I've ever been - sat on the toilet for ten minutes, when I got up the room was spinning and I just wrapped myself in my bathrobe and curled up on the bathroom tile floor hoping either it would end or I would die. I thought I'd had food poisoning before but those were just a few bouts of diarrhea - I've never experienced something like this. So anyway yeah, I don't touch the dry roasted peanuts anymore.