When John chopped his finger off in the moving machinery of the Easter Egg production line (1), Roger rashly offered to help him look for the missing digit (2). But after crawling through a couple of miles of chocolate pipe, he was beginning to think it wasn't such a good idea...
(1) - This really did happen. Maybe I'd better not mention the company in question, though.
(2) - This didn't really happen. In fact I found the severed finger waiting for me on my desk the next morning, with a request to "Please take a photograph of this so that we can prove that we found it and that it's not still circulating around in the chocolate somewhere."