One of my sons was eating a burrito at a fast food restaurant when he was about 4 yrs old, and he was chewing, and chewing, etc. Told him to spit it out, and I looked at it. It was an artery part. "Y" shaped, hollow like y tube. Took it back to counter and she said, "Oh, it's just fat". Told her they needed to check their meat as they shredded it. He couldn't chew thru it, so he would have choked on it if he tried to swallow.
Was eating a package of Whoppers, (the Halloween snack size) and got up from my desk. When I came back, a bug was crawling out of the package. Haven't had any whoppers since.
Was at a restaurant, they passed out bread rolls. Opened a roll to butter and a spider was baked into an air pocket. Didn't eat any of those either.