When I was 7 or so, they put a camera up my arsehole, because it seemed like I had blood in my shit. It hurt and was humiliating. In the end it turned out that the colour came from a synthetic candy colorant, that is now forbidden
As far as GI inspections go, I had one in March last year and one in June this year. They just showed a "minimal" hiatal hernia, like the quacks call it. Easy for them to say, since it's not
they who get their own hydrochloric acid up in the mouth