McDonalds food, especially the "chicken" nuggets, make my skin crawl, a while ago, I saw a documentary, where someone infiltrated the production facility for the nuggets with a hidden camera, it showed the workers actually scraping bits of the pulped chicken skins they add to the nuggets off the floor, and worse, off the soles of their shoes, and flicking it back into the mixers
I had a bad experience with those things as a kid, I bit into a nugget, and chomped down to find a f^$*@ whole chicken's beak inside the offending nugget, I haven't ever eaten the things since, save one time, when I accidentally smoked crack (long story, involving a laced blunt, unbeknownst to me) and was bought a meal by a friend to help come down, I think I eat chicken nuggets then, my memory is kinda hazy about the whole episode, I certainly wouldn't touch the damned things when I wasn't high though, they are beyond disgusting.