Yes...I was in high school when Olean (olestra) came out. The health discussions were that 2% of people would have a "negative reaction" to the ingredient.
I was driving with my parents from Ohio to Long Island, NY to visit my grandparents. Nearing the NJ border and several hours into the trip, we stopped for gas and my mother bought some Lay's "Wow!" chips. I ate two potato chips and didn't like the taste...
Not 15 minutes later, we make it to NJ and I'm riding in the far back seat of our Caravan. I DOUBLE OVER in abdominal pains. I was a healthy, well-built high-schooler and within a minute I was curled in the fetal position, near tears, in a cold sweat on a minivan bench seat. The rest of my family was wondering WTF was wrong with me whilst happily munching away at the bag-o-chips.
Long and DISGUSTING story short, I made my parents pull over a half dozen times throughout NJ so I could destroy some gas station toilets. I mean, it was like Trainspotting and "The Worst Toilet In All Of Scotland" every stop we went and I didn't even care. By the time I was totally cleaned out, we still had three hours through NYC, the boroughs, and the rest of Long Island. Despite the sharp, stabbing abdominal pains throughout the trip, I didn't mess myself like that guy. Olean was far and away the worst digestive issue I've ever experienced in my life.
Unlike food poisioning or stomach illnesses we've all had, I actually felt fine by the time we got to our destination...after one last clearing-of-the-baffles. My parents and I joke about it to this day. I still get wary when Baked Lays come across my way (which I do like)...any low-cal chip I immediately scan the label for Olean or olestra in the ingredients.